Heating and Air Conditioning
179
A/C Diagnostic Module
Problem Codes
The diagnostic module has two LED lights
(one green and one red) which indicate if a
system problem has been detected. If a
problem is detected, a fault code or “blink”
code is activated to identify the condition.
The blink codes listed on the label are:
Slow Green
Normal
Fast Green
Low system voltage
1 Red Blink
Loss of refrigerant
2 Red Blinks
Overcharge, blockage or
fan failure
3 Red Blinks
Open or shorted clutch
or circuit
4 Red Blinks
Open pressure switch or
circuit
The air conditioning system is under
pressure. The possibility of an explosion
is possible if serviced incorrectly. A
qualified technician should perform any
service needed. Failure to follow this
may lead to an explosion causing severe
injury or death.
W3002004
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