Table of Contents
Advertisement
23 - TROUBLESHOOTING CHART
A list of possible faults, as well as the probable cause and suggested solutions is shown in below table. In the event of a unit malfunc-
tion it is recommended to disconnect the power supply and ascertain the cause.
Symptom
Unit does not start
Unit stairs and stops frequently
Unit continuously cuts out at low
pressure
Unit continuously cuts out at high
pressure
Abnormal system noise
Compressor loses oil
Water loss
Very low condensation pressure
Condensation pressure very high
in relation to the air outlet, high
pressostat cutoff
Table -Troubleshooting chart
Cause
No power supply
Main switch open
Low line voltage
A protection has tripped
Contactor stuck open
Seized compressor
Defective compressor contactor
Defective compressor
Refrigerant losses
Defective low pressure stat
Refrigerant losses
Indoor fan does not operate
COOLING CYCLE
Defective high pressurestat
Blocked filter drier
Outdoor fan does not operate
Piping Vibration
Noisy compressor
Badly lining panels
Leak in system
Defective drainage connections
a) Gas lack
b) Compressor suction not air tight
c) Liquid circuit plugging
a) Insufficient air flow
b) Air inlet temperature very high
c) Dirty condenser (does not exchange)
d) Much refrigerant load (flooded con-
denser)
e) The condenser fan is broken down
f) Air in the cooling circuit
Solution
Conned Power supply
Close switch
Cheek voltage and remedy the deficiency
Reset
Replace contactor
Replace compressor
Replace contactor
Replace compressor
Reliant the charge. pull a vexillary.
recharge the system with the quantity
indicated on the nameplate
Replace pressure stat
Check and add the necessary quantity
Check fan motor
Replace pressure stat
Replace filter drier
Check fan motor
Support piping
Check and change if necessary
Install correctly
Repair leak
Check and tighten if necessary
a) Search for leaks, complete charge
b) Verify compressor state and replace
c) Verify the dehydrating filter and ex-
pansion valve
a) Verify the air circuits (flow, filter clean-
liness...)
b) Verify the control thermostat readjust-
ment
c) Clean it
d) Collect refrigerant
e) Repair
f) Make vacuum and load
34
Advertisement
Table of Contents
