CVHE-SB-32A 9
General Troubleshooting Information
Problem 1: AFD (adaptive frequency drive) diagnostics
Corrective Action:
1 Correctly input all AFD parameters called out and specified in the AFD Operation
Maintenance manuals, such as AFDA-OM-1 and AFDB-OM-1.
2 Review and follow the specific trouble shooting sections of the appropriate drive.
Problem 2: Failure to accelerate or did not accelerate
Corrective Action:
1 Set the appropriate acceleration Timers 1 and 2 in machine configuration menu.
2 Set correct starter type in machine configuration menu.
3 Replace defective CTs.
4 Defective Starter module, ct input. Replace Starter module.
5 Defective IGV linkage.
6 Defective Stepper module.
7 Fast Restart. Change Starter to a X-13650453-16 or newer and Chiller modules. For X-
13650450-15 or newer, reference Trane CVHE-SB-46.
Problem 3: Approach Temperature reads -40°F
Corrective Action:
1 A CLD X-13650448-04 or newer is required with a Chiller module X-13650450-04 or newer.
Problem 4: Auto X-former starter: Runs (3) seconds and trips. Unit will not transition.
Corrective Action:
1 Verify Starter module. If X-13650453-07 or later, it requires transition circuit.
2 No voltage on transition complete J4 circuit. Trace circuit path. Reference Trane CVHE-SB-
36.
Problem 5: IGV BPI not found or low
Corrective Action:
1 BPI switch location may have changed. Reposition/calibrate BPI switch.
2 Defective BPI switch and/or wire.
3 Incorrect Stepper motor wiring.
4 Replace the Stepper module.
5 Correctly program the BPI maximum travel setpoint in service settings.
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