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Manufacturer: Carrier, Guadalajara, Spain
Order No. 15031-20, 11.2001. Supersedes order No.: New Printed on Totally Chlorine-Free Paper.
Manufacturer reserves the right to change any product specifications without notice. Printed in the Netherlands
AM-036920
TROUBLESHOOTING CHART
A list of possible faults, as well as the probable cause and suggested solutions is shown in Table 10. In the event of a unit
malfunction it is recommended to disconnect the power supply and ascertain the cause.
Table 10 - Troubleshooting chart
Symptoms Cause Remedy
Unit does not start No power supply Connect power supply
Main switch open Close switch
Low line voltage Check voltage and remedy the deficiency
A protection has tripped Reset
Contactor stuck open Replace contactor
Seized compressor Replace compressor
Unit starts and stops frequently Defective compressor contactor Replace contactor
Defective compressor Replace compressor
Refrigerant losses Check and add the necessary quantity
Unit continuously cuts out at COOLING CYCLE:
low pressure Defective low pressurestat Replace pressurestat
Refrigerant losses Check and add the necessary quantity
Indoor fan does not operate Check fan motor
Unit continuously cuts out at COOLING CYCLE:
high pressure Defective high pressurestat Replace pressurestat
Blocked filter drier Replace filter
Outdoor fan does not operate Check fan motor
HEATING CYCLE:
Defective high pressurestat Replace pressurestat
Indoor fan does not operate Check fan motor
Abnormal system noise Piping vibration Support piping
Noisy compressor Check and change if necessary
Badly fitting panels Install correctly
Compressor loses oil Leak in system Repair leak
Water loss Defective drainage connections Check and tighten if necessary
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