Troubleshooting Checklist - Trane GETB Installation Manual

Problem
No response to any
thermostat setting
Unit short cycles
Blower runs, but compressor does not
Insufficient capacity
High pressure switch open
High head pressure
Low suction pressure
28
Troubleshooting
Checklist
Heating Cooling Cause
X X Main power off
X X Defective control transformer
X X Broken or loose connection
X X Defective thermostat
X X Transformer
X X Thermostat or sensor improperly located
X X Defective compressor overload
X X Defective compressor contactor
X X Supply Voltage too low
X X Defective compressor capacitor
X X Defective windings
X X Limit switches open
X X Dirty filter
X X Blower RPM too low
Loss of conditioned air due to leaks in
X X
ductwork
X Introduction of excessively hot return-air
X Introduction of excessively cold return-air
X X Low on refrigerant charge
X X Restricted thermal expansion valve
X X Defective reversing valve
X X Thermostat improperly located
X X Unit undersized
X X Inadequate water flow
X X Scaling in heat exchanger
X Water too hot
X Water too cold
X Inadequate GPM
X Water too hot
X Inadequate air flow
X Dirty filter
X X Overcharged with refrigerant
X X Defective pressure switch
X Trash in heat exchanger
X Low water flow
X X Overcharge of refrigerant
X X Non-condensable in system
X X Water too hot
X Dirty filter
X Inadequate air flow
X X Undercharged
X X Restricted thermal expansion valve
X Inadequate air flow
X Dirty filter
X Inadequate GPM
Correction
Check fuses
Replace
Repair
Replace
Reset Transformer
Relocate
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
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
Locate leak, repair and recharge
Repair / replace
Check, clean blower and coil
Clean/replace
Increase GPM
WSHP-SVN08B-EN