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22
Troubleshooting and Diagnosis
TROUBLESHOOTING, MAINTENANCE, RECYCLING
MALFUNCTION
If the machine
does not start...
If there is water seeping
into the vehicle...
If the appliance
is not cooling...
If the appliance
is not heating...
If the machine
stops working...
POSSIBLE CAUSES
e current temperature is lower than 64°F
e set point temperature has been satised
Defective thermistor or thermal protection
Low refrigerant
e compressor is damaged
e heat exchanger coils are dirty
e MODE button is not in the right position
e external fan is defective
e set point temperature has been satised
e current temperature is higher than 86°F
Defective thermistor or thermal protection
Damaged/Stuck 4-Way Valve
e MODE button is not in the right position
e compressor is damaged
Low refrigerant
e heat exchanger coils are dirty
e internal/interior fan is malfunctioning
e heat exchanger coils are dirty
e air lter is dirty/obstructed
e condensate drain hose is cracked, clogged,
or is not secured onto the exhaust port
e voltage is too low (less than 100V)
ere is insucient power going into the unit
Defective thermal protection
Damaged Compressor
Defective thermistor or thermal protection
e electric condenser is damaged/malfunctioning
e heat exchanger coils are dirty
e air lter is dirty/obstructed
e external fan is defective
e voltage is too low (less than 100V)
e electric condenser is damaged/malfunctioning
Special Supplemental Maintenance:
For optimal eciency, it is recommended to have
your dealer/contractor perform designated cleaning
prior to using, on the heat exchange coils and the
condensation drain holes.
If the airow is insucient,
or no longer circulates
inside the vehicle...
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