CLCH-SVX013B-EN
79
Troubleshooting
This section is intended to be used as a diagnostic aid only.
For detailed repair procedures, contact your local Trane
service representative.
WARNING
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
Recommended Action
Motor fails to
start
Blown fuse or open circuit breaker
Replace fuse or reset circuit breaker.
Overload trip
Check and reset overload.
Improper wiring or connections
Check wiring with diagram supplied on unit.
Improper current supply
Compare actual supply power with motor nameplate recommendations.
Contact power company for adjustments.
Mechanical failure
Check that motor and drive rotate freely. Check bearing lubricant.
Motor stalls
Open phase
Check line for an open phase.
Overloaded motor
Reduce load or replace with larger motor.
Low line voltage
Check across AC line. Correct voltage if possible.
Excessive
vibration
Shipping spacers not removed
Remove shipping spacers and/or bolts (see
Motor runs and
then dies down Partial loss of line voltage
Check for loose connections. Determine adequacy of main power supply.
Motor does not
come up to
speed
Low voltage at motor terminals
Check across AC line and correct voltage loss if possible.
Line wiring to motor too small
Replace with larger sized wiring.
Motor overheats
Overloaded motor
Reduce load or replace with a larger motor.
Motor fan is clogged with dirt preventing proper
ventilation
Remove fan cover, clean fan and replace cover.
Excessive motor
noise
Motor mounting bolts loose
Tighten motor mounting bolts.
Rigid coupling connections
Replace with flexible connections.
Worn motor bearings
Replace bearings and seals.
Fan rubbing on fan cover
Remove interference in motor fan housing.
Low water coil
capacity
Incorrect airflow
Check fan operating condition.
Incorrect water flow
Inspect the water pumps and valves for proper operation and check the
lines for obstructions.
Incorrect water temperature
Adjust the chiller or boiler to provide the proper water temperature.
Coil is piped incorrectly
“Piping and Connections,” p. 42
).
Dirty fin surface
Incorrect glycol mixture
Verify glycol mixture and adjust if necessary.
Summary of Contents for Performance Climate Changer PSCA
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