Troubleshooting - Trane Axiom GEHB Installation Operation & Maintenance

Problem Heating Cooling Cause
No response to
X
any thermostat
X
setting
X
X
Unit short
X
X
cycles
X
B l o w e r r u n s X
but compressor
X
does not
X
X
X
X
X
X
Insufficient ca- X
pacity
X
X
X
X
X
X
X
X
X
X
X
X
High pressure
switch open
X
X
X
X
H i g h h e a d
pressure
X
X
X
X
X
L o w s u c t i o n
X
pressure
X

Troubleshooting

X Main power off
X Defective control transformer
X Broken or loose connection
X Defective thermostat
X Thermostat improperly located
X Defective compressor overload
X Heat anticipator setting
X Defective compressor overload
X Defective compressor contactor
X Defective lockout relay
X Supply voltage too low
X Defective compressor capacitor
X Defective windings
X Limit switches open
X Seized compressor
X Dirty filter
X Blower RPM too low
X (1-phase)blower running backward
X Loss of conditioned air due to leaks in ductwork
X Introduction of excessively hot return air
X Introduction of excessively low return air
X Low on refrigerant charge
X Cap/tube strainer or expansion valve is restricted Replace
X Defective reversing valve
X Thermostat improperly located
X Unit undersized
X Inadequate water flow
X Scaling in chiller
X Water too hot
Water too cold
X Inadequate GPM
X Water too hot
Inadequate air flow
Dirty filter
X Overcharged with refrigerant
X Defective pressure switch
X Trash in chiller
X Low water flow
X Overcharged with refrigerant
X Non-condensibles in system
X Water too hot
Dirty filter
Inadequate air flow
X Undercharged
X Restricted metering device
X Inadequate air flow
X Dirty filter
21
Correction
Check fuses
Replace
Repair
Replace
Relocate
Replace
Adjust
Replace(if external)
Replace
Replace
Correct
Replace
Replace
Check cause/Replace
"Bump off" with start capacitor/replace
Replace/clean
Correct
Checking wiring at capacitor
Repair leaks
Correct
Correct
Locate leak, repair and recharge
See Touch Test Chart
Relocate
Recalculate heat gains/losses
Increase GPM
Clean or replace
Decrease temperature
Increase temperature
Increase
Decrease temperature
Check, clean blower and coil
Clean/replace
Decrease charge
Check replace
Backflush
Increase GPM
Decrease charge
Evacuate and recharge
Decrease temperature
Clean/replace
Check, clean blower and coil
Locate leak, repair and recharge
Repair/replace
Check, clean blower and coil
Clean/replace