Trane GEH, GEV manual Troubleshooting Checklist, Hazardous Service Procedures

Troubleshooting

Checklist

WARNING

Hazardous Service Procedures!

The maintenance and trouble shooting 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 pow- er 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.

Problem

No response to any thermostat setting

Unit short cycles

Blower runs, but compressor does not

Insufficient capacity

High pressure switch open

Heating	Cooling	Cause	Correction
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
X	X	Thermostat or sensor improperly located	Relocate
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
X	X	Dirty filter	Replace/clean
X	X	Blower RPM too low	Correct
X	X	Loss of conditioned air due to leaks in	Repair leaks
		ductwork
	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	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

8 4 WSHP-SVX01D-EN