Trane Axiom GEH-E035, Installation, Operation And Maintenance Manual, Page: 112 / 124

112 WSHP-SVX01Y-EN
Table 61. Troubleshooting table
Problem
Hea-
ting
Cool-
ing
Cause Correction
No response to any
thermostat setting
X X
Main power off
Check fuses
X X Defective control transformer
Replace
X X Broken or loose connection
Repair
X X Defective thermostat
Replace
X X Transformer Reset Transformer
Unit short cycles
X X
Thermostat or sensor improperly located
Relocate
Blower runs, but compressor
does not
X X
Defective compressor overload Replace (if external)
X X
Defective compressor contactor Replace
X X
Supply Voltage too low
Correct
X X
Defective compressor capacitor Replace
X X
Defective windings Replace
X X
Limit switches open Check cause/Replace or repair
Insufficient capacity
X X
Dirty filter Replace/clean
X X Blower RPM too low Correct
X X
Loss of conditioned air due to leaks in
ductwork
Repair leaks
X
Introduction of excessively hot return-air
Correct
X
Introduction of excessively cold return-air
Correct
X X
Low on refrigerant charge
Locate leak, repair and recharge by weight
(not by superheat)
X X
Restricted thermal expansion valve Replace
X X
Defective reversing valve
See WSHP-IOM-# for touch test chart
X X
Thermostat improperly located
Relocate
X X Unit undersized
Recalculate heat gains/losses
X X
Inadequate water flow
Increase GPM
X X
Scaling in heat exchanger Clean or replace
X Water too hot
Decrease temperature
X Water too cold
Increase temperature
X X Filter drier blocked
Replace
X X
Defective reversing valve Check or replace
High pressure switch open
X
Inadequate GPM
Increase water flow to unit
X Water too hot
Decrease temperature
X
Inadequate air flow Check, clean blower and coil
X
Dirty filter Clean/replace
X X
Overcharged with refrigerant Decrease charge
X X
Defective pressure switch Check or replace
T Trro ou ub blle essh ho oo ottiin ng g