Troubleshooting; Deluxe Controls - Trane Axiom EXH Series 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 47. Diagnostic LEDs
Color: Green
LED1
OFF
ON
ON
ON
FLASH
ON
ON
ON
ON
ON
ON
Table 48. Troubleshooting table
Problem
No response to any thermostat
setting
Unit short cycles
WSHP-SVX014J-EN
Color: Red
LED2 LED3
OFF OFF
OFF OFF
OFF FLASH
OFF ON
ON OFF
FLASH ON
FLASH FLASH
ON ON
ON FLASH
FLASH OFF
ON OFF
Heat- Cool-
ing ing
X X
X X Defective control transformer
X X
X X
X X
Thermostat or sensor improperly located
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 the table
below.
Manual Lockout (condensate overflow)
Cause
Main power off
Broken or loose connection
Defective thermostat
Transformer
Controller Mode
Control OFF
Normal/Compressor OFF
Anti-short cycle
Normal/Compressor ON
Brownout Condition
Soft Lockout (low pressure)
Soft Lockout (high pressure)
Manual Lockout (low pressure)
Manual Lockout (high pressure)
Compressor Disable
Correction
Check fuses
Replace
Repair
Replace
Reset Transformer
Relocate
63