8. HOW TO JUDGE COOLING CYCLE PROBLEM
Cooling problem
service call
Dial position "cold"
power OK
No problem
Mechanical fan is rotating.
(Only applicable to the model
with mechanism fan)
F-FAN problem. Electrical parts problem
Over charging
* Replace dryer and
recharging.
Bad operation of
* Replace compressor
and dryer.
N
(Only applicable to the model with F-FAN
N
N
N
N
Y
Y
Moisture generated
* Replace dryer and
recharging.
Y
Is compressor rotating?
Is F-FAN rotating?
Is F-FAN rotating?
Is evaporator cool?
S/P frost
Is compressor operating
under 180V?
Turn off the power,
warm up evaporator
enterance and
turn on the power,
is evaporator cool?
Power off
Lower pressure side
cut refrigerant exists?
Connect high pressure
side valve
(Measure eject
pressure)
Measure eject pressure
(Above setting valve in
the tangle?)
Y
Y
Clogging
Location of clogging
Judge by compressor
oil color leak in high
presure,
leak in low presure side
N
Y
Bad eject pressure
N
* Replace
compressor
Is F-FAN rotating?
Bad compressor
* Replace
compressor
Y
Electrical
part
program
N
Y
* Replace cycle.
Fllow steps in flowchart
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