RBI Pulse Troubleshooting [PDF]

Zitiervorschau

Corrective Instruction (Non Compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002

Revision 1.0 (original release)

Date: 19-Aug-2009 Page: 1 of 20

Expiration Date: Not Applicable GENERAL All work activity must comply with Otis Worldwide Jobsite Safety Standards (WWJSSS) and local safety rules. Prior to commencement of work, read the entire procedure and complete a Job Hazard Analysis (JHA). If you are unsure about the work task at hand, immediately stop work and consult with your supervisor. IMPORTANT!! An automatic learn run must not be executed to “clear” an Alarm. Always use the service tool to determine why the Alarm was generated and inspect the CSBs.

1. AFFECTED UNITS / SHIPMENTS This CI affects AAA21700X, ABA21700X, AAA21700Y, ABA21700Y, and AAA21700AC Pulse units. Note that there is no specific affected unit list for this CI. It is to be distributed and used as a general troubleshooting guide for field mechanics in order to prevent field turnbacks. 2. ISSUE 2.1 Description This is a general CI to assist in the troubleshooting of Pulse units. It covers the well-known symptoms, potential root causes, and corrective actions of the following cases: • Resistance values are too high (181 ohms) - see Section 3.4.1 • Resistance values are too low (shorted cords) - see Section 3.4.2 • LEDs Flash Code 5, see Section 3.4.11 • LEDs Flash Code 6, see Section 3.4.10 • LEDs Flash Code 7, see Section 3.4.9 • LEDs Flash Code 9, see Section 3.4.8 • LEDs Flash Code 10, see Section 3.4.7 • LEDs Flash Code 11, see Section 3.4.6 • LEDs Flash Code 12, see Section 3.4.5 • LEDs Flash Code 13, see Section 3.4.4 • LEDs Flash Code 15, see Section 3.4.3 This work and the information it contains (collectively referred to as ‘Work’) are the confidential property of the Otis Elevator Company (‘Otis’). This Work is delivered on the express condition that: it will be used or reproduced by Otis employees exclusively for, or on behalf of, Otis; it will not be disclosed, reproduced, or distributed by or to others, in whole or in part, without the prior written consent of Otis: and, it and any copies will be promptly returned to Otis upon demand or upon termination of employment. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory)

OTIS

Coated Steel Belt Pulse Monitoring Diagnostics

OECF

All Gen2 Elevators

No.: CI WW-09-002 Date: 19-Aug-2009 Page: 2 of 20

• •

no LEDs flash, see Section 3.4.3 Damage Due to Electro-static Discharge (ESD), see Section 3.4.12

Pulse monitors the condition of the cords within the coated steel belt (CSB) for strength. In addition, it can also detect exposed cords under certain conditions. Pulse operates by using correlations between the change in the resistance in the cords to the change in strength due to use. Pulse monitors the cords in pairs. It works by sending current down one cord which travels through the shorting connector at the other end and returns through the adjacent cord. The resistance for the cord pair is measured and compared to known percentage changes. Percent increases in resistance indicate loss of strength and are compared to corresponding strength limits. Percent decreases in resistance indicate shorted cords possibly to each other, to a sheave due to an exposed jacket, or to ground. Pulse will respond to both increases in resistance (indicating loss in strength) and decreases in resistance (indicating a short).

PC Board Cord Cord Pair 2 { Cord Pair 1 { Non-shorting Connection

Current

Shorting Connection

Figure 1 Schematic of Pulse architecture When Pulse is set up, a learn run is performed to obtain starting resistance values for all the cord pairs. A successful learn run is particularly important as it establishes the baseline that the percent changes in resistance are calculated from. Without this learn run, Pulse cannot function. It is essential that good connections are established between the Pulse CSB connectors and the cords inside the CSB. Pulse is designed to operate with one missed cord pair connection for 32 kN CSBs and 2 missed cord pair connections for 64 kN CSBs. If more connections are missed, Pulse will not function.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 3 of 20

A service tool is required to diagnose any problem with Pulse. To understand why Pulse is not acting as expected the service tool must be used to find out what resistance values it is reading, and possibly also what resistance values it recorded as the starting resistance values (recorded at the learn run). The resistance values will indicate if there is a poor connection or a shorted connection and which cord pairs are affected.

2.2 Basic Diagnostic Procedures Tools needed: Handheld service tool Multi-meter 3mm metric Allen wrench or “T” handle wrench Phillips screwdriver #2 A number of general diagnostic procedures are used for trouble-shooting Pulse. The following are described in the Appendix A and will be referenced in Section 3 of this document as appropriate: A.1 Identifying if the problem is in the CSB or the Pulse unit A.2 Using the service tool to find present resistance values A.3 Using the service tool to find starting resistance values A.4 Using the service tool to find percent of starting resistance values A.5 Using an ohm meter to verify shorting connections A.6 Using an ohm meter to verify the PC board connections 2.3 Root Cause Refer to root causes and corrective actions in Section 3.

3. CORRECTIVE ACTION(S) 3.1 At Supplier and/or Component Factories and/or SSI Not Applicable. The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 4 of 20

3.2 In CLC and/or MOD-Centers Not applicable. 3. 3 In Service Center (Warehouses) Not applicable. 3.4 Field Implementation This section describes problems with Pulse that might be encountered in the field and how they may be diagnosed and corrected. 3.4.1 Common Problem: Resistance values are too high (181 ohms) This problem can manifest different symptoms that are described below. Ultimately, the connection between the Pulse connector and the CSB cords is poor or non-existent (missed cords). This can occur at either the shorting end or the PC board end. 3.4.1.1 One cause can be the CSBs are not fully clamped in the connector. Check the connector screws to ensure they are fully seated. 3.4.1.2 Another cause can be the cords are not lined up with the connector pins. Try unclamping the CSB, repositioning it within the connector, and reclamping. 3.4.1.3 Check the connector pins to ensure they are not bent. Note that repeated connection attempts can dull the connector pins. After numerous attempts, the unit may need to be replaced due to dulled connector pins. Placing a business card between the CSB and the metal clamp may help if the pins are getting dulled.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 5 of 20

3.4.2 Common Problem: Resistance values are too low (shorted cords) This problem can manifest different symptoms that are described below. Ultimately, current is not flowing completely through both cords in the cord pair or a ground connection is present. There are several potential causes for this. 3.4.2.1 One cause can be fire clamps, especially if un-insulated fire clips are used with CSBs that have grooves. Un-insulated fire clips do not have a coating on the surface that touches the CSB jacket. To trouble-shoot, remove the un-insulated fire clamps and see if that solves the problem. If it does and fire clips are required, replace the un-insulated fire clips with insulated fire clips. 3.4.2.2 Another problem that can arise is that the fire clip may have crushed the cords within the CSB jacket so much that the cords are touching inside the jacket. To check this, multiply the length of the CSB in meters from the connector to the fire clip by 0.17575 and see if this equals the resistance value shown on the service tool. If the cords are crushed and touching, trim the damaged section from the CSB. If there is not enough CSB to trim the damage section, the CSB must be replaced.

Figure 2. Insulated fire clips have a white coating as shown above. Un-insulated fire clips have no coating (not shown here)

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 6 of 20

3.4.2.3 For CSBs with grooves, another cause of low resistance values can be shorting of the cords where the CSB passing through the slot at the top of the termination. The cords exposed in the grooves can touch the edge of the sheet metal slot and short. The solution is to wrap the CSB in insulating tape where it contacts the slot or remove the CSB from the slot.

Termination slot.

Figure 3. Grooved CSB should not pass through the termination slot.

3.4.2.4 For CSBs with grooves, another cause for cord shorting can be salt water or other contaminants in the grooves. The contaminants may provide a path for the current and create a short. This is especially true for the stationary loop of the CSB from the car terminations to the The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 7 of 20

Pulse unit within which standing water can accumulate. To check this, clean the grooves and see if the problem is solved. The solution is to wrap the cleaned grooves in insulating tape or cover the grooves with sealant if the problem section of CSB does not contact any sheaves. 3.4.2.5 If the CSB is not cut cleanly, wires from one cord may be touching an adjacent cord causing a short. The solution is to cut the CSB cleanly and cover the end with insulating tape (tape the shorting connector end only). 3.4.2.6 A short may also be created if there is no tape covering the CSB cut ends that exit the shorting connector. The exposed cord ends may be touching metal or have surface contaminants that cause a short. As shown in Figure 4, use electrical tape to cover the cut ends.

CSB Cut End

Electrical Tape

Figure 4. Cover exposed ends of the CSB from the shorting connector with electrical tape to prevent incidental contact with other materials in the hoistway. 3.4.2.7 Worn jacket/damaged CSBs can cause a short if the cords are exposed. Examine the CSB for exposed cords. If such a location is found and it does not pass over a sheave, cover with electrical tape. If a significant amount of jacket has been damaged, or if the location passes over a sheave, the CSB needs to be replaced. 3.4.2.8 A foreign substance in the CSB such as a nail or screw can also cause a short. Examine the CSB for such foreign objects and remove. 3.4.2.9 Another possibility is the cords are shorted to earth ground. Disconnect power from Pulse. Check for continuity between each cord end of the CSB and the earth ground connection of the Pulse wire harness. If this condition is found, examine the entire length of the CSB to find where the cords are getting grounded and insulate it.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 8 of 20

3.4.2.10 A short can also be caused if the connector pins protruding below the PC board are touching the metal brace below the board. Check for continuity between the metal clamp on top of the CSB and the cord ends to diagnose this condition. If this condition is found, put insulating tape between the metal brace and the pins protruding below the PC board. Another solution is to add plastic washers between the PC board and the metal brace. The pins protruding below the PC board can be trimmed, but this is not recommended as it may damage the solder connections. 3.4.2.11 Another possibility is adjacent cords are touching within the jacket (manufacturing defect). This problem has been seen only in CSBs manufactured by Contitech. Inspect the ends of the CSBs closely to see if adjacent cords are touching. It may be however, that the cords are touching somewhere along the length of CSB and not touching at the ends. The procedure to identify if two cords are touching is: 1. Remove both ends of the CSB from the connectors. 2. Measure with the continuity tester from one cord to both adjacent cords. 3. If continuity exists between two cords, the cords are touching within the jacket. CSBs with cords that are touching must be replaced. 3.4.3 LEDs Flash Code 15 or No LEDs Flash After Automatic Learn Attempt Pulse did not detect any CSBs. This is a severe connection problem. 1) Examine the present resistance values as described in section A.2 to determine which cord pairs are the problem. You may need to follow sections A.5 and A.6 to determine if the problem is in the shorting connector or the PC board connector. 2) Depending on the resistance values found, use sections 3.4.1 and 3.4.2 to troubleshoot and correct the problem. 3.4.4 LEDs Flash Code 13 This flash code indicates that the temperature in the hoistway is above 58°C (136°F). This is an unsafe condition for the CSBs. This fault will clear when the temperature drops below 55°C (131°F). Recommended action is to ventilate the hoistway. If the unit is in a glass hoistway receiving direct sunlight, some means must be used to block the sunlight so that the correct ambient temperature is measured. Note: this fault does not apply for NSAA units. 3.4.5 LEDs Flash Code 12 After Automatic Learn Attempt Pulse has detected that CSBs are present, but either too many cord pairs were missed or the resistance values are too inconsistent.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 9 of 20

3.4.5.1 The likely problem is a poor connection to the cords within the CSB. 1) Examine the present resistance values as described in section A.2 to determine which cord pairs are the problem. You may need to follow sections A.5 and A.6 to determine if the problem is in the shorting connector or the PC board connector. 2) Depending on the resistance values found, use sections 3.4.1 and 3.4.2 to troubleshoot and correct the problem. 3.4.5.2 This problem can also occur if the cord pair resistance values vary too much between CSBs. If the resistance values are similar for all cord pairs, then a manual learn run should be successful. Note: a manual learn run requires measurement of the CSBs to within 100 mm (see installation manuals listed in section 6 References). 3.4.5.3 If the resistance values via the service tool (section A.2) do not match the resistance values taken by probing the board (section A.6), then the board may have been damaged by electro-static discharge. The board must be replaced at if this is found. 3.4.6 LEDs Flash Code 11 After Automatic Learn Attempt Pulse has detected that CSBs are present, but either too many cord pairs were missed or the resistance values are too inconsistent. Ultimately, the problem is likely in the connection to the cords within the CSB. 1) Examine the present resistance values as described in section A.2 to determine which cord pairs are the problem. You may need to follow sections A.5 and A.6 to determine if the problem is in the shorting connector or the PC board connector. 2) Depending on the resistance values found, use sections 3.4.1 and 3.4.2 to troubleshoot and correct the problem. This problem can also occur if the cord pair resistance values vary too much. If the resistance values are similar for all cord pairs, then a manual learn run should be successful. Note: a manual learn run requires measurement of the CSBs to within 100 mm (see installation manuals listed in section 6 References). If the resistance values via the service tool (section A.2) do not match the resistance values taken by probing the board (section A.6), then the board may have been damaged by electrostatic discharge.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 10 of 20

3.4.7 LEDs Flash Code 10 A board fault has occurred. Remove the EEPROM and replace the board. Install the EEPROM in the new board. The service tool can be used to find the exact board fault codes. To do this, remove housing cover and plug in the service tool. Enter , , , . This will display the status code for each CSB. The status code will match the number of flashes of the LED for each CSB. Press , press again, and press a third time to see the board fault codes. More than one code may display in 2 second intervals. Note all codes that display. 3.4.8 LEDs Flash Code 9 The EEPROM has failed. Replace the EEPROM and execute a manual learn run for units older than one year or with more than 100,000 starts. Note: a manual learn run requires measurement of the CSBs to within 100 mm (see installation manuals listed in section 6 References). Otherwise, an automatic learn run is acceptable. 3.4.9 LEDs Flash Code 7 This indicates RSL communication failure. This fault can occur even if the Pulse unit does not use the RSL interface. The cause may be the DIP switch on the PC board. Check the settings per Figure 5. S1 OFF

OFF ON

OFF

ON

OFF OFF

ON ON ON

Figure 5. DIP switch settings

S1

Setting for RSL Interface

OFF OFF

Setting for all other Interfaces

If the DIP switch is set correctly, check the following items:  Poor wire connections  Incorrect wiring on controller end (e.g., connected to group link, not hall link for RSL unit)  Incorrect wiring on Pulse unit end (e.g., wire connector on wrong board connector)

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 11 of 20

   

No hall link in the hoistway – a dedicated harness is required Scotch locks on Pulse wiring harness not making contact to the hoistway wiring Controller configuration parameter not set Damaged Pulse board

3.4.10 LEDs Flash Code 6 IMPORTANT!! An automatic learn run must not be executed to “clear” an Alarm. Always use the service tool to determine why the Alarm was generated and inspect the CSBs. Flash Code 6 indicates an “Alarm” condition. There are several reasons why Pulse may generate an Alarm. Use the service tool to determine the exact cause or causes. To do this, remove housing cover and plug in the service tool. Enter , , , . This will display the status code for each CSB. The status code will match the number of flashes of the LED for each CSB. Press to see the Alarm codes for each CSB. These are the Alarm codes definitions 00 = No Alarm present 01 = Alarm caused by Average CSB resistance too high indicating severely worn cords 02 = Alarm caused by too many broken pairs (open circuit caused by poor connection or broken cords) 04 = Alarm caused by too many bad pairs (resistance too high indicating severely worn cords) 08 = Alarm caused by too many shorted pairs when in Alert status 16 = Alarm caused by too many shorted pairs 32 = Alarm caused by more than 1 CSB in Alert Note: The code displayed is the sum of all active codes for a CSB. For example, if severely worn cords (code 01) and too many broken pairs (code 02) are present, then the Alarm code would be 03. If it is suspected that the Alarm is in error, i.e., that the CSBs are still in good condition (such as CSBs that have been in service for a few months), compare the resistance values taken by the service tool (section A.2) to the resistance values taken by ohm meter (section A.6). Also, check if the problem lies with the CSB or with the Pulse unit by following the procedure in section A.1. For Alarms that involve Alarm code 08 or 16, use section 3.4.2 to investigate possible causes.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 12 of 20

3.4.11 LEDs Flash Code 5 Flash code 5 indicates an “Alert” condition and will not affect the operation of the elevator. It is intended as an early warning that the CSBs will need replacement in the near future. There are several reasons why Pulse may generate an Alert. Use the service tool to determine the exact cause or causes. To do this, remove housing cover and plug in the service tool. Enter , , , . This will display the status code for each CSB. The status code will match the number of flashes of the LED for each CSB. Press , and then press again to see the Alert codes for each CSB. These are the Alert codes definitions: 00 = No Alerts present for requested CSB 01 = Alert due to wear present for requested CSB (very worn cords) 02 = Alert due to shorts present for requested CSB 03 = Alert due to both wear and shorts present for requested CSB As with the case of Alarms, the Alert code displayed is the sum of all active codes for a CSB. If it is suspected that the Alert is in error, i.e., that the CSBs are still in good condition (such as CSBs that have been in service for a few months), compare the resistance values taken by the service tool (section A.2) to the resistance values taken by ohm meter (section A.6). Also, check if the problem lies with the CSB or with the Pulse unit by following the procedure in section A.1. For Alerts that involve Alert code 02 or 03, use section 3.4.2 to investigate possible causes. 3.4.12 Damage Due to Electro-static Discharge (ESD) The Pulse unit can become damaged during installation from ESD when the CSBs are connected to the PC board as well as static discharge from the installer. A static charge is created in the jacket of the CSB when the car runs. This induces a charge in the cords of the CSB. When the CSBs are connected to the PC board the charge in the cords can arc to the contacts on the PC board damaging transistors on the board. This will likely result in Flash Code 10, 11, 12 or 15. The risk of ESD increases as the humidity decreases. To prevent the ESD discharge from the CSBs, touch the cord ends to the rails before connecting to the PC board. The charge will be absorbed by the rails. Standard installation procedure requires grounding of the installer by a wrist strap when working near the exposed PC board.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 13 of 20

4. REQUIRED MATERIAL 4.1 In Service Center Not applicable 4.2 In Field Not applicable. 5. COST SETTLEMENT ACCORDING TO WHQ POLICY Q-9 Material Cost. Not applicable. Affected units list (AUL). There is no affected unit list for this CI.

6. REFERENCES Global installation manual, new equipment: AAA21700X_CSU_NE Global installation manual, existing units: AAA21700X_CSU_RETRO Other installation manuals: SWP_N_1_1_18_0_6 (NSAA) FAA25AKP1 (Gien) C-19-24 (Japan) Service tool manual: AAA21700X_ADT

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 14 of 20

APPENDIX A A.1 Identifying if the problem is in the CSB or the Pulse unit To determine if the problem lies with a CSB or with the Pulse unit: 1) Disconnect the Pulse unit from power. 2) Disconnect the CSB in Alert or Alarm from the PC board connector; 3) Find a CSB that is not in Alert or Alarm and disconnect it from the PC board connector; 4) Swap the CSB connections. For example, if CSB 3 is in Alarm and CSB 4 is not, connect CSB 3 in the PC board connector for CSB 4 and connect CSB 4 in the PC board connector for CSB 3. 5) Restore power to the Pulse unit; 6) Perform a manual learn run via the service tool if the elevator has more than 100,000 starts or more than a year of service. Otherwise, perform an automatic learn run by depressing the Learn switch 5 times within 5 seconds; 7) Run the car until an Alert or Alarm occurs. If the Alert or Alarm occurs for the CSB that was previously in Alert or Alarm, the problem is in the CSB. If the Alert or Alarm occurs for the CSB that was not previously in Alert or Alarm, the problem is in the Pulse unit.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 15 of 20

A.2 Using the service tool to find present resistance values Pulse can be used as an ohm meter. It will display the resistance values it is reading at that instance. To do this, remove housing cover and plug in the service tool. Enter , , , , and then enter the CSB number. The first resistance will be cord pair one of that CSB. Press to see the remaining cord pairs. Key Pressed After plugging in the Service Tool

Screen Shown After Key is Pressed SELF TEST -OK- MECS-MODE

M

RBI: xxx30934xxx Press F to start

F

Setup=1 Learn=3

2

Status=1 StrtR=2 CordR=3 Cord%=4

3

Enter the Belt# to View (1-5)

After entering CSB number (1 – 5)

B,PP=###.### Ohm channel =

Copyright 2003,4 Otis Elevator Co

View=2

B is CSB number PP is cord pair number ###.### is the present resistance in ohms

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 16 of 20

A.3 Using the service tool to find starting resistance values This will display the resistance values for each cord pair that were recorded at the learn run. Pulse uses the present resistance values and the starting resistance values to compute the percent of starting resistance values. To do this, remove housing cover and plug in the service tool. Enter , , , , and then enter the CSB number. The first resistance will be cord pair one of that CSB. Press to see the remaining cord pairs. Key Pressed After plugging in the Service Tool

Screen Shown After Key is Pressed SELF TEST -OK- MECS-MODE

M

RBI: xxx30934xxx Press F to start

F

Setup=1 Learn=3

2

Status=1 StrtR=2 CordR=3 Cord%=4

3

Enter the Belt# to View (1-5)

After entering CSB number (1 – 5)

B,PP=###.### Ohm channel =

Copyright 2003,4 Otis Elevator Co

View=2

B is CSB number PP is cord pair number ###.### is the starting resistance in ohms

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 17 of 20

A.4 Using the service tool to find percent of starting resistance values This will display the percent starting resistance values which are the present resistance values divided by the starting resistance values. The percent starting resistance values are compared to the thresholds to determine if an Alert or Alarm must be generated. To do this, remove housing cover and plug in the service tool. Enter , , , , and then enter the CSB number. The first percent starting resistance will be for cord pair one of that CSB. Press to see the remaining cord pairs. Key Pressed After plugging in the Service Tool

Screen Shown After Key is Pressed SELF TEST -OK- MECS-MODE

M

RBI: xxx30934xxx Press F to start

F

Setup=1 Learn=3

2

Status=1 StrtR=2 CordR=3 Cord%=4

3

Enter the Belt# to View (1-5)

After entering CSB number (1 – 5)

B,PP=###.###% channel =

Copyright 2003,4 Otis Elevator Co

View=2

B is CSB number PP is cord pair number ###.### is the percent starting resistance

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory)

OTIS

Coated Steel Belt Pulse Monitoring Diagnostics

OECF

All Gen2 Elevators

No.: CI WW-09-002 Date: 19-Aug-2009 Page: 18 of 20

A.5 Using an ohm meter to verify shorting connections These measurements are taken by probing the ends of the cords of the CSBs that connect to the Pulse unit. The measurements check the connections between the CSB and the shorting connector. It is a best practice to check these connections prior to installing the CSB in the PC board connector. The measurements may be taken with the CSB in or out of the PC board connector.

Probe

Probe

Remove power from the Pulse unit. With a volt-ohm meter, place a probe on the first cord and the other probe on the second cord (see Figure 6). Note the resistance. Move the probe on the first cord to the third cord. The meter should read open circuit if the CSB is out of the PC board connector (see Figure 7) or twice the resistance between cords 1 and 2 if the CSB is in the PC connector (see Figure 8). Move the probe on the second cord to the fourth cord. Note the resistance. Move the probe on the third cord to the fifth cord. The meter should read open circuit. Repeat for all cords. Repeat for all CSBs.

1

2

3

Figure 6. Using ohm meter to check shorting connections

Open Circuit 1

2

Note Resistance

Figure 7.

3

Open Circuit 4

5

Note Resistance

Pattern if CSB is out of the PC board connector

2x Resistance 1

2

3

Less than 1 ohm 4

5

Note Resistance

Note Resistance

Figure 8.

Pattern if CSB is in the PC

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 19 of 20

A.6 Using an ohm meter to verify the PC board connections This checks the connection between the cords in the CSB and the PC board connector. Place the probes on the solder pads for cord pair 1 as shown below in Figure 9. Note the resistance measured. Place the one probe on the solder pads of cord pair 1 that is adjacent to cord pair 2 and the other probe on the solder pad of cord pair 2 that is adjacent to cord pair 1. The meter should read open circuit. Note the measurement. Repeat for all cord pairs. Repeat for all CSBs.

Adjacent solder pads between cord pair 7 and cord pair 8. Check adjacent solder pads of all cord pairs for continuity (should be open).

Cord Pair 2

Cord Pair 1

Figure 9. Using ohm meter to check PC board connections

Note: The resistance readings should match very closely with the present resistance readings taken by the Service Tool.

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007

Corrective Instruction (Non-compulsory) Coated Steel Belt Pulse Monitoring Diagnostics All Gen2 Elevators

OTIS OECF No.: CI WW-09-002 Date: 19-Aug-2009 Page: 20 of 20

APPROVAL FORM Signatures with an (*) are required. Name Signature Mark Orelup Originator* Mark Orelup Vijay Jayachandran Vijay Jayachandran OEC Engineering Manager Doug Taylor Doug Taylor WHQ Global PIC/TRC Mgr*

Date 04-Aug-2009 04-Aug-2009 19-Aug-2009

The use and ownership of this work is defined by and subject to the legend contained on the front page of this document. Unpublished Work - © Copyright 2009 Otis Elevator Company, Document number: QTY00011 Revised 11-Apr-2007