Warnings
Code
Cause
shown
Communication error
Err
between control card
W.501
and interface card.
Communication error
Err
between control card
W.502
and interface card.
Communication error
Err
between control card
W.503
and interface card.
Current-sensor
Err
malfunction.
W.514
Excess voltage
Err
compressor
W.523
Compressor
Err
synchronization
W.524
General malfunction
Err
external aggregate.
W.527
PFC malfunction
Err
W.528
22
Warranty
Consequences
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Heat pump stops.
Heating with electric
heating element up
to the set nominal
value.
Use
Troubleshooting
Check communication cable
between both cards.
Check power supply for exter-
nal aggregate and interface
card.
Check connecting cable 1 and 2.
Check communication cable
between both cards.
Check power supply for external
aggregate. Check connecting
cable 3. Press switch HZ serves
to cut the supply in case of high
pressure.
Check external aggregate card.
Check compressor.
Check compressor inductor's
resistance.
Check
external
function.
Check compressor wiring.
Ensure compressor starts.
No soft compatibility due to
interface card or external aggre-
gate card being changed.
Replace
external
card.
Servicing
aggregate's
aggregate