4
CAUTION! Avoid contact with the PCB and frost protection
element due to risk of electrocution
Yes
A1 / A2 / A3 / A4
Temperature sensor malfunction
T1 / T2 / T3 / T4
Remove the plug from
the socket
Remove the filter, the plastic front cover and the metal cover
Remove temperature sensor from the PCB
Check temperature sensor resistance; see table
Is resistance OK? | No |
[°C][K
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| Temp |
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| Resistance [K!] |
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| oC |
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| MIN |
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| MED |
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| M A X |
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| 10 |
| 19.570 |
| 19.904 |
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| 20.242 |
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| 15 |
| 15.485 |
| 15.712 |
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| 15.941 |
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| 18 |
| 13.502 |
| 13.681 |
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| 13.861 |
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| 19 |
| 12.906 |
| 13.071 |
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| 13.237 |
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| 20 |
| 12.339 |
| 12.491 |
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| 12.644 |
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| 21 |
| 11.801 |
| 11.941 |
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| 12.082 |
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| 22 |
| 11.291 |
| 11.420 |
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| 11.550 |
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| 25 |
| 9.900 |
| 10.000 |
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| 10.100 |
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| 30 |
| 7.959 |
| 8.057 |
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| 8.155 |
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Replace the PCB
CAUTION: Reset unit!
Replace the temperature sensor
A5 / A6
Motor bypass / frost protection element
malfunction
Remove the filter,
the plastic front cover and the metal cover
Then initiate the
Yes
Remove the motor and the cog (incl. plastic part)
Is the motor
running?
No
Check connection and PCB;
12 VDC if motor is running (see menu P76)
Yes
Replace cog
Is the cog defective? | No |
Replace motor
Yes
Replace motor
Does the
PCB registerNo current?
Replace the PCB
CAUTION: Reset unit!
