Trane Axiom GEH Series Installation, Operation And Maintenance Manual page 96

Troubleshooting
Table 60. Troubleshooting table (continued)
Problem
Blower runs, but compressor does
not
Insufficient capacity
High pressure switch open
High head pressure
96
Heat- Cool-
ing ing
Defective compressor overload
X X
Defective compressor contactor
X X
Supply Voltage too low
X X
Defective compressor capacitor
X X
X X
X X
X X
X X
X X Loss of conditioned air due to leaks in ductwork
Introduction of excessively hot return-air
X
Introduction of excessively cold return-air
X
Low on refrigerant charge
X X
Restricted thermal expansion valve
X X
Defective reversing valve
X X
Thermostat improperly located
X X
X X
X X
Scaling in heat exchanger
X X
X
X
X X
Defective reversing valve
X X
X
X
X
X
Overcharged with refrigerant
X X
Defective pressure switch
X X
Trash in heat exchanger
X
X
Overcharge of refrigerant
X X
Non-condensable in system
X X
X X
X
X
Cause
Defective windings
Limit switches open
Dirty filter
Blower RPM too low
Unit undersized
Inadequate water flow
Water too hot
Water too cold
Filter drier blocked
Inadequate GPM
Water too hot
Inadequate air flow
Dirty filter
Low water flow
Water too hot
Dirty filter
Inadequate air flow
Correction
Replace (if external)
Replace
Correct
Replace
Replace
Check cause/Replace or repair
Replace/clean
Correct
Repair leaks
Correct
Correct
Locate leak, repair and recharge by weight (not
by superheat)
Replace
See WSHP-IOM-# for touch test chart
Relocate
Recalculate heat gains/losses
Increase GPM
Clean or replace
Decrease temperature
Increase temperature
Replace
Check or replace
Increase water flow to unit
Decrease temperature
Check, clean blower and coil
Clean/replace
Decrease charge
Check or replace
Backflush
Increase GPM
Decrease charge
Evacuate and recharge by weight
Decrease temperature
Clean / replace
Check, clean blower and coil
WSHP-SVX01AC-EN