Dantherm cdp 165, Service Manual

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Hygrostat and other control options,
continued
Defrosting If the CDP 75 MK II/125 MK II/165 are used in the temperature range between 15 and
20°C the evaporator coil should be protected by a sensor.
When the defrosting sensor registers a temperature below 5°C, the control interprets
this as ice building up on the evaporator coil and lets the unit run for another 30
minutes. Then the compressor stops and the fan leads the room air over the evaporator
coil until the defrosting sensor registers that the temperature has reached 5°C.
This defrosting process is called passive, demands-related defrosting, as it only takes
place when needed.
The defrosting sensor is supplied on demand as an extra accessory. A mounting
instruction follows the defrosting sensor.
Connection of
defrosting sensor Please follow this procedure to connect a defrosting sensor:
Step Action
1 The defrosting sensor is fixed in points 15 and 16 on the PCB terminal
2 DIP Switches 3 and 6 are set on ON
3 The sensor is placed in the sensor pocket of the evaporator coil