Troubleshooting - Trane Performance Climate Changer PSCA Installation, Operation And Maintenance Manual

Troubleshooting

This section is intended to be used as a diagnostic aid only.
For detailed repair procedures, contact your local Trane
service representative.
Hazardous Service Procedures!
The maintenance and troubleshooting procedures recommended in this manual could result in exposure to electrical,
mechanical or other potential safety hazards. Always refer to the safety warnings provided throughout this manual
concerning these procedures. Unless specified otherwise, disconnect all electrical power including remote disconnect
and discharge all energy storing devices such as capacitors before servicing. Follow proper lockout/tagout procedures
to ensure the power can not be inadvertently energized. When necessary to work with live electrical components,
have a qualified licensed electrician or other individual who has been trained in handling live electrical components
perform these tasks. Failure to follow all of the recommended safety warnings provided, could result in death or
serious injury.
Table 17. Air handler troubleshooting recommendations
Symptom Probable Cause
Blown fuse or open circuit breaker
Overload trip
Motor fails to Improper wiring or connections
start
Improper current supply
Mechanical failure
Open phase
Motor stalls Overloaded motor
Low line voltage
Excessive
Shipping spacers not removed
vibration
Motor runs and
Partial loss of line voltage
then dies down
Motor does not Low voltage at motor terminals
come up to
Line wiring to motor too small
speed
Overloaded motor
Motor overheats
Motor fan is clogged with dirt preventing proper
ventilation
Motor mounting bolts loose
Rigid coupling connections
Excessive motor
noise
Worn motor bearings
Fan rubbing on fan cover
Incorrect airflow
Incorrect water flow
Low water coil
Incorrect water temperature
capacity
Coil is piped incorrectly
Dirty fin surface
Incorrect glycol mixture
CLCH-SVX013B-EN
WARNING
Recommended Action
Replace fuse or reset circuit breaker.
Check and reset overload.
Check wiring with diagram supplied on unit.
Compare actual supply power with motor nameplate recommendations.
Contact power company for adjustments.
Check that motor and drive rotate freely. Check bearing lubricant.
Check line for an open phase.
Reduce load or replace with larger motor.
Check across AC line. Correct voltage if possible.
Remove shipping spacers and/or bolts (see
Check for loose connections. Determine adequacy of main power supply.
Check across AC line and correct voltage loss if possible.
Replace with larger sized wiring.
Reduce load or replace with a larger motor.
Remove fan cover, clean fan and replace cover.
Tighten motor mounting bolts.
Replace with flexible connections.
Replace bearings and seals.
Remove interference in motor fan housing.
Check fan operating condition.
Inspect the water pumps and valves for proper operation and check the
lines for obstructions.
Adjust the chiller or boiler to provide the proper water temperature.
Verify coil piping (see "Piping and Connections," p.
Clean the fin surface (see
Verify glycol mixture and adjust if necessary.
"Fan Isolation," p.
42).
"Coils," p. 73).
36).
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