PROTEC
AC-400 USER MANUAL V2.20
Main troubleshooting
Ma lf u n cti on
Reasons
So lu t ion
1.
Insufficient vacuum pump oil.
1. Add oil to central line
2.
Pump oil emulsion, dirty
2.
Put new oil
Low vacuum degree
3.
Pump oil inlet plugged.
3.
Clean oil inlet.
4.
Leakage in pump connection.
4.
Check connection
5.
Components worn out.
5.
Put new pump.
Vacuum pump inject
1.
Excessive oil volume.
1.Discharge oil to central line
oil.
2.
Entrance pressure too high.
2.Run Recovery function first.
1.
Fused (in Power cable connection
1.
Change fuses.
box, or PCA)
2.
Change PCA.
No display
2.
PCA burnt.
3.
Connect power cable reliably.
3.
Power cable loosened.
4.
Change LCD.
4.
LCD not work
1.
Leakage in automotive A/C or
Recovery
does
not
equipment pipeline.
1.
Make leakage test. Machine leakage test
2.
Compressor not work
with referenc to service manual.
stop
Remarks: In winter, it is normal
2.
Change compressor.
that recovery takes longer time.
1.
No refrigerant in A/C.
1.
Stop recovery.
2. Support screw of gas cylinder load
2. Unsrew the support screw in the bottom of
No
change
in
cell not loosened.
the weight sensor.
recovery volume
3.Gas cylinder load cell not work or
3.
Calibrate gas cylinder load cell, or change
PCA failure.
the load cell, or change PCA.
4.For RCC-6A, hand valves not
4.
Open RCC-6A HP/LP hand valves
opened.
While
auto A/C
has
1.
Low
pressure
switch
plug
refrigerant,
1.
Fasten low pressure switch plug.
equipment
displays
disconnected from PCA socket.
2.
Open RCC-6A HP/LP hand valves
2.
For RCC-6A, hand valves closed
alarm 005
High
pressure alarm
1.
High
pressure
switch
plug
004 but gas cylinder
disconnected from PCA socket.
1.
Fasten high pressure switch plug.
gauge does not show
excessive
pressure
2.
Pipeline
connecting compressor
2.
Change compressor exit side hoses.
exit blocked.
value
No charge
or slow
1.Insufficient
refrigerant
in
1. Add refrigerant to 5kg.
equipment
2.
Run recovery first.
charge.
2.System has pressure.
3.Check solenoid No5.
3.Charge solenoid not work.
22/24
