Rectify interference
6 720 643 196 (2010/02)
19
2.3.15 Compressor does not reach correct frequency
2.3.16 Fault in HTF pump G3
2.3.17 High temperature electric box
Description: Gives an alarm if the actual value of the compressor speed deviates by >5Hz for two minutes.
See separate fault tracing tree
(ÆChapter 2.4)
Check the supply to the inverter circuit board in the
molex switch on the I/O circuit board.
Tab. 15
Description: Input Di4 low, delay 2 seconds.
See separate fault tracing tree
ÆChapter 2.6.
Tab. 16
6 720 643 196-13.1I
Description: High temperature on driver circuit board. The temperature is taken from a sensor mounted on the
driver circuit board.
Check Action
1. Is the fan in the electric box running? yes: Æ 2
no: B Check output Do3 on the I/O circuit board.
B Replace fan or I/O circuit board if necessary.
2. If there flow through the cooling coil?
The hoses to the electric box should feel
cold under the insulation.
yes: Does the error message recur? Æ 3
no: B Open the heat transfer fluid circuit and flush
through the cooling coil. Then vent properly.
3. Thermistor in the driver circuit board
defective.
B Replace driver circuit board.
Tab. 17
6 720 643 196-14.1I
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