4
CAUTION! Avoid contact with the PCB and frost protection
element due to risk of electrocution
Yes
A7
Malfunction
Frost protection element does not warm up (sufficiently)
Remove the plug from the socket
Remove the filter,
the plastic front cover and the metal cover
Remove the plug of frost protection element from the PCB
Is the resistance
of the plug of the frost
protection element > 300 ohm?
No
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No
Replace T1 temperature sensor
CAUTION! Avoid contact with the PCB and frost protection
element due to risk of electrocution
Yes
A8
Malfunction
Frost protection element gets too hot
Remove the filter,
the plastic front cover and the metal cover
Does the frost protection
element flap work properly? (Check with P76)
No
Check the following factors:
-Fan settings (too low?)
-Supply air valves (opened too wide?)
-The entire duct system (blockage?)
See A5 / A6 Malfunction section “Initiate
Instructions for the Installer 41
