12 . Troubleshooting
To perform repair, maintenance or adjustment operations not described in the above chapters, contact skilled
staff only. Failure to follow this instruction will relieve CTR S.R.L. of any responsibility for unit malfunctioning.
The table indicates the persons that need to perform the operation. Strictly follow the instructions given.
After solving the problem following the instructions, the phases you were executing can be repeated from scratch.
Problem Causes Remedies Operation
The machine does
not work
1) Repeated turning on and off
2) External unit fuses blown
3) Internal unit fuses blown
1) Turn off the machine and wait
at least 10 sec. before restart-
ing it
2) Replace
3) Replace
1) Operator
2) Operator
3) Technical staff
The unit does not
recover
1) Fuse blown
2) Recovery compressor damaged
1) Check the integrity of the recov-
ery compressor/solenoid valve fuse
on the circuit board
2) Replace the compressor
1) Technical staff
2)Technical staff
The vacuum pump
does not work
1) Gas in the circuit
2) No power to the pump
3) Vacuum pump damaged
1) Execute a recovery phase
2) Check the electric power supply
and the fuses
3) Replace the pump
1) Operator
2) Technical staff
3) Technical staff
The vacuum timer
does not start but
the pump works and
the pressure gauges
indicate -1 bar
1) Pressure sensor out of
calibration
2) The pump is not running
1) Calibrate the pressure sensor
(see Service menu).
2) Check the integrity of the vacu-
um pump fuse on the circuit board.
1) Operator
2) Technical staff
A leak is always indi-
cated after the leak
test
1) Pressure sensor out of
calibration
2) Sediment in the vacuum sole-
noid valve
1) Calibrate the pressure sensor
(see Service menu).
2) Remove the sediment
1) Operator
2) Technical staff
The unit does not
charge the refriger-
ant
1) The charge solenoid valve does
not open
2) The one-way valve is locked
1) Check the integrity of the sole-
noid valve fuse
2) Replace the valve
1) Technical staff
2) Technical staff
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