Failure analysis
PF166
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4. Check inverter box (beside the compressor) [235]
The signal to start the compressor [230] will be activated by a short circuit between "C" and
"T". There is no risk of high voltage, sparks or high current. You can use even a not isolated
cable. If the thermostat-display-electronic [40] failed the compressor [230] could be started
manually by a short circuit between "C" and "T" of the inverter box [235]
Before short circuiting the terminal "C" and "T" to start the compressor [230] manually please
disconnect all connectors coming from the display-electronic [40]. First brown "+" cable
above "F" than the black "T" and blue "C" cable. If the inverter box [235] is connected to the
battery and if the battery voltage is higher than the cut-off voltage the compressor [230]
must start suddenly after disconnecting "C" and "T".
If the compressor [230] do not start the inverter or the compressor [230] could be damaged
Display
Electronik
Sensor
5. Compressor [230]
If you connect an LED to the "+" terminal above "F"
and to the "D" terminal (see picture 2) you could
have a feedback if the inverter box [235] is
operating and some other events are responsible
why the compressor [230] don't starts. See table.
6. Electronic thermostat with user interface (display and key board) [40]
If the display [40] monitors no number or if the Minus-LED is not blinking please disconnect
the blue cable "C" on the inverter box [235] as well as the other blue cable "-" and connect
them together. If the display [40] will not show any characters or blinking Minus-LED the
inverter box [235] is damage.
