40
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