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SAGINAW CONTROL & ENGINEERING • A/C USER MANUAL
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14. Taking Into Operation
15. Repair
Attention!
The unit can be damaged by lack of lubricant. To ensure that the compressor is adequately lubricated, the oil, which has
been displaced during transport, must be allowed to flow back into it. The unit must therefore be allowed to stand for at
least 30 minutes before being connected to the mains and taken into operation. Upon connection the internal fan will start
working. If the temperature inside the enclosure is higher than the set value of the controller, both the compressor and
external air fan start working. Once the air inside the enclosure reaches the set temperature, the compressor and external
fan will stop.
The unit is pre-set at 95°F, which is suitable for most of the electronic devices.
If Drainage required, use PVC 10mm (3/8 inch) ID Hose.
Failure
Condition
Cause
Solution
Unit Does
Not Cool
Internal fan does not work
Power not connected.
Verify power supply
Internal fan works, external fan
and compressor do not work
Enclosure temperature is
below setting temperature (St)
Verify values of parameter "St"
Door switch contact is open
Verify door switch
Controller does not work
Replace controller
Internal fan works, external
fan and compressor do not
work Display shows alternating
"OFF" and temperature
The sequence of the phases
inside the power supply
connector is incorrect
Change phases inside power
supply connector
External and internal fan work,
compressor does not work
Compressor motor electrical
failure
Verify external fan, verify
ambient temperature, clean
condenser
Capacitor for compressor failed Replace capacitor
Compressor works, external
fan does not work
External fan needs to be
replaced
Replace external fan
Enclosure
Overheating
Compressor and fans (external
and internal) work all the time
Unit cooling undersized
Enclosure needs a bigger
cooling unit
Enclosure needs a bigger
cooling unit
Thermal compressor protector
triggered
Verify ambient temperature,
clean condenser
Refrigerant leakage
Contact dealer/service center
Excessive
Condensate
Door enclosure open
Ambient air gets into the
enclosure
Ensure door is closed, add a
door switch and connect it to
controller
Door enclosure closed
Enclosure IP degree minimum
IP54
Seal openings on enclosure
Damaged/misplaced sealing
strip
Repair strip accordingly
