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Short form service manual - CIM 5 Controller
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Short form service manual
Operating temperature
-30 ̊C to +30 ̊C
-22 F to +86 F
Ambient temperature
-30 ̊C to +50 ̊C
-22 F to +122 F
Model: SC-MCI40-WC, SC-MCI40, SCI- 40 and SCU-40
Refrigerant: R-134a
Charged with 4.5 kg / 9.9 lb
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Short form service manual
Controller box view
Phase direction
Phase direction
Heat element
Cond. fan low
Cond. fan high
Evap. fan low
Evap. fan high
FC/Compressor
Main circuit breaker
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Short form service manual
Controller box view
Terminal block PCB
Power meas
Power in
Modem (if installed)
Transformer
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Short form service manual
Controller box view
Controller connections
Fuses: 2x 0.4/0.63 Amp.
3x 10 Amp.
Fuse: 6.3 Amp.
Recommended to raise
F1 and F2 to 0.63 Amp.
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Short form service manual
Unit rear side view
Tsuc sensor
Return air sensor
Humidity sensor
Evaporator sensor
Supply air sensors
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Short form service manual
Replacement of Tsuc sensor
Remove PVC Cover to access
Tsuc sensor
Cut cable tie (one pcs). Sensor can then
be removed
When installing the new sensor, make sure to
insert properly in tube
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Short form service manual
Replacement of air exchange sensor
Remove the two finger screws on the
butter fly and remove cover plate
Remove the fourteen screws to loosen
the black cover where the air ex-sensor
is mounted
Replace the sensor and install all the
dismantled parts again
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Short form service manual
Air exchange sensor calibration
Close fresh air butterfly
In the service menu SO5; Con- figuration menu FO6; Press
“Enter” twice
Calibration is completed
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Short form service manual
Supply voltage measurements
Measure voltage output from the
main circuit breaker
Measure voltage supplied to the
power meas PCB
Range -50 Hz: 335 – 460 VAC
Range -60 Hz: 390 – 525 VAC
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Short form service manual
Supply voltage measurements
Measure the voltage output from
the power meas PCB to the main
circuit
Range -50 Hz: 335 – 460 VAC
Range -60 Hz: 390 – 525 VAC
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Short form service manual
Supply voltage measurements
Measure the voltage output from
the power meas PCB to the
transformer
Range -50 Hz: 335 – 460 VAC
Range -60 Hz: 390 – 525 VAC
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Short form service manual
Supply voltage measurements
Measure the voltage supplied to
the transformer
Range -50 Hz: 335 – 460 VAC
Range -60 Hz: 390 – 525 VAC
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Short form service manual
Supply voltage measurements
Measure the voltage output of the
transformer 20 VAC
The output voltage depends on
the supply voltage
Range: 15.3 – 24.3 VAC
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Short form service manual
Supply voltage measurements
Measure the voltage output from
the transformer 24 VAC
The output voltage depends on
the supply voltage
Range: 18.9 – 30.0 VAC
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Short form service manual
Check of 6,3 Amp fuse
Measure voltage from GND to top
of fuse
Fuse is ok
Range 18.9 - 30 VAC
Fuse is not ok
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Short form service manual
Check power to ON/OFF PCB
Measuring from ground to
terminal 4 (see picture) shows
that the controller is turned OFF
After turning ON, the voltage can
be measured
Range 18.9 – 30.0 VAC
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Short form service manual
Check power to ON/OFF PCB
After turning ON you can read the
voltage supplied through the ”ON/
OFF” PCB on terminal
1 and 2
Range 15.3 – 24.3 VAC
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Short form service manual
Check Frequency Converter
Frequency converter MUST always
have the black foil mounted for
protection of print, components
and your safety
WARNING - HIGH VOLTAGE
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Short form service manual
Check Frequency Converter
If deviation between phases is
more than 15 VAC:
Alarm ”523 FC phase loss” or
Alarm ”516 FC Trip phase loss”
will be given
Range -50 Hz: 335 – 460 VAC
Range -60 Hz: 390 – 525 VAC
E.g. due to unstable power supply
from the genset
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Short form service manual
Check Frequency Converter
A green light indicates FC is ok
A flashing green light indicates FC
communicates with the controller
A red light indicates a problem
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