Trane Axiom GECE 006, Installation, Operation And Maintenance Manual

Page: 32 / 40

32 WSHP-SVX11E-EN
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.
Deluxe 24V Controls
Troubleshooting units which contain the deluxe 24V
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 10, p. 32 .
Table 10. Diagnostic LEDs
Color: Green Color: Red
Controller Mode
LED1 LED2 LED3
OFF OFF OFF Control OFF
ON OFF OFF Normal/Compressor OFF
ON OFF FLASH Anti-short cycle
ON OFF ON Normal/Compressor ON
FLASH ON OFF Brownout Condition
ON FLASH ON Soft Lockout (low pressure)
ON FLASH FLASH Soft Lockout (high pressure)
ON ON ON Manual Lockout (low pressure)
ON ON FLASH Manual Lockout (high pressure)
ON FLASH OFF Manual Lockout (condensate overflow)
ON ON OFF Compressor Disable
Table 11. Troubleshooting table
Problem Heating Cooling 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