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SAGINAW CONTROL & ENGINEERING • A/C USER MANUAL
B
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
Internal fan does not work
Internal fan works, external fan
and compressor do not work
Internal fan works, external
Unit Does
fan and compressor do not
Not Cool
work Display shows alternating
"OFF" and temperature
External and internal fan work,
compressor does not work
Compressor works, external
fan does not work
Compressor and fans (external
and internal) work all the time
Enclosure
Overheating
Enclosure needs a bigger
cooling unit
Door enclosure open
Excessive
Condensate
Door enclosure closed
14. Taking Into Operation
15. Repair
Cause
Power not connected.
Enclosure temperature is
below setting temperature (St)
Door switch contact is open
Controller does not work
The sequence of the phases
inside the power supply
connector is incorrect
Compressor motor electrical
failure
Capacitor for compressor failed Replace capacitor
External fan needs to be
replaced
Unit cooling undersized
Thermal compressor protector
triggered
Refrigerant leakage
Ambient air gets into the
enclosure
Enclosure IP degree minimum
IP54
Damaged/misplaced sealing
strip
Solution
Verify power supply
Verify values of parameter "St"
Verify door switch
Replace controller
Change phases inside power
supply connector
Verify external fan, verify
ambient temperature, clean
condenser
Replace external fan
Enclosure needs a bigger
cooling unit
Verify ambient temperature,
clean condenser
Contact dealer/service center
Ensure door is closed, add a
door switch and connect it to
controller
Seal openings on enclosure
Repair strip accordingly
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15
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