Instruction Booklet
29
ENGLISH
KHEOS
EN
12. Troubleshooting
Repair, maintenance or adjustment operations not described in the above chapters must be performer only by
specialized staff. (Failure to do so will relieve DENSO of all responsibility for unit malfunction).
The table indicates the skill level needed to perform the operation. It is important to follow these instructions
strictly.
Operator: person trained to use the machine (trained directly/indirectly by CTR staff)
Specialized technician: person trained and authorized by CTR to perform technical procedures.
After you have solved the problem with the instructions given below, you can restart the procedures you were performing from the
beginning.
Problem
Causes
Remedies
Operation
Unit not working
1) Unit switched on and off
repeatedly
2) External unit fuses blown
3) Internal unit fuses blown
1) Switch unit off and wait at
least 10 sec. before restarting
unit
2) Replace
3) Replace
1) Operator
2) Operator
3) Specialized technician
Unit not recovering
1) Fuse blown
2) Recovery compressor damaged
1) Check fuse in recovery compres-
sor/solenoid valve on circuit board
2) Replace compressor
1) Specialized technician
2) Specialized technician
Vacuum pump not
working
1) Gas in the circuit
2) No power to pump
3) Vacuum pump damaged
1) Perform a recovery phase
2) Check power supply and fuses
3) Replace the pump
1) Operator
2) Specialized technician
3) Specialized technician
Vacuum timer does
not start but pump
works and pressure
gauges read -1bar
1) pressure sensor out of
calibration
2) Pump not running
1) Calibrate the pressure sensor
(see Service menu).
2) Check vacuum pump fuse on cir-
cuit board.
1) Operator
2) Specialized technician
Leak test always
indicates that there
is a leak
1) Leak test always indicates that
there is a leak
2) Sediment in vacuum solenoid
1) Calibrate the pressure sensor
(see Service menu).
2) Remove sediment
1) Operator
2) Specialized technician
Unit does not charge
refrigerant
1) Charge solenoid does not open
2) One-way valve is locked
1) Check vacuum pump fuse.
2) Replace valve
1) Specialized technician
2) Specialized technician
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