60
WSHP-SVX13C-EN
Troubleshooting
General Unit Troubleshooting
1
WARNING
Hazardous Service Procedures!
The maintenance and troubleshooting procedures recommended in this section of the 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. When possible, disconnect all electrical power including
remote disconnects 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 per these tasks. Failure to follow all of the recommended safety warnings
provided, could result in death or serious injury.
1
Variable speed compressors sound different than single speed compressors. The compressor sound will change as the speed and operating conditions change.
Problem
Heating Cooling
Cause
Correction
No response to any zone sensor
setting
X
X
Main power off
Check fuses
X
X
Defective control transformer
Replace
X
X
Broken or loose connection
Repair
X
X
Defective zone sensor
Replace
X
X
Transformer
Reset Transformer
Unit short cycles
X
X
Zone sensor improperly located
Relocate
Blower runs but compressor does not
X
X
Supply Voltage too low
Correct
X
X
Defective windings
Replace
X
X
Limit switches open
Check cause/replace or repair
X
X
Zones sensor error
Check cause/replace or repair
X
X
Compressor drive error
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
Zone sensor 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
