Troubleshooting - Trane GEHE 072-180 Installation, Operation And Maintenance Manual

Troubleshooting

WARNING
Hazardous Service Procedures!
Failure to follow all precautions in this manual and on
the tags, stickers, and labels could result in death or
serious injury.
Technicians, in order to protect themselves from
potential electrical, mechanical, and chemical hazards,
MUST follow precautions in this manual and on the
tags, stickers, and labels, as well as the following
instructions: Unless specified otherwise, disconnect all
electrical power including remote disconnect and
discharge all energy storing devices such as capacitors
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 perform these
tasks.
Table 63. Diagnostic LEDs
Color: Green
LED1 LED2
OFF OFF
ON OFF
ON OFF
ON OFF
FLASH
ON FLASH
ON FLASH
ON ON
ON ON
ON FLASH
ON ON
Table 64. Troubleshooting table
Problem
No response to any
thermostat setting
Unit short cycles
Blower runs, but compressor does not
WSHP-SVX01Q-EN
Color: Red
LED3
OFF
OFF
FLASH
ON
ON OFF
ON
FLASH
ON
FLASH
OFF
OFF
Heating Cooling
X X
X X
X X
X X
X X
X X
X X
X X
X X
X X
X X
X X
Deluxe Controls
Troubleshooting units which contain the deluxe control
option may be made easy by using the three LEDs (light
emitting diodes).These LEDs are provided for indicating
the operating mode of the controller.The LEDs are
intended to aid in troubleshooting.The LEDs are labeled
on the circuit board with numbers as referenced in
Table 63, p. 113.
Controller Mode
Normal/Compressor OFF
Normal/Compressor ON
Brownout Condition
Soft Lockout (low pressure)
Soft Lockout (high pressure)
Manual Lockout (low pressure)
Manual Lockout (high pressure)
Manual Lockout (condensate overflow)
Compressor Disable
Cause
Main power off
Defective control transformer
Broken or loose connection
Defective thermostat
Transformer
Thermostat or sensor improperly located
Defective compressor overload
Defective compressor contactor
Supply Voltage too low
Defective compressor capacitor
Defective windings
Limit switches open
Control OFF
Anti-short cycle
Correction
Check fuses
Replace
Repair
Replace
Reset Transformer
Relocate
Replace (if external)
Replace
Correct
Replace
Replace
Check cause/Replace or repair
113