ALARM FUNCTIONS AND DISPLAYS
6 720 641 467 (2010/01)
43
B
Fill the heating system and vent if required.
POSSIBLE CAUSE 2; BLOCKED PARTICLE FILTER:
B
Select
Acknowledge
.
B
Check filter.
B
Clean filter if required (
Æ
chapter 14.7).
POSSIBLE CAUSE 3: PRIMARY HEATING CIRCUIT
PUMP FAULT.
B
Check whether the primary heating circuit pump has
stopped (
Æ
Fig. 53, [1], page 41)..
POSSIBLE CAUSE 4: INADEQUATE/NO FLOW RATE
ACROSS THE HEAT PUMP.
B
Select
Acknowledge
.
B
Check whether the primary heating circuit pump has
stopped (
Æ
Fig. 53, [1], page 41)..
B
Check that all the valves are open. The thermostat
valves in heating systems should be fully open and in
floor heating systems at least half of the coils should
be fully open.
B
Select a higher speed for the heat transfer medium
pump (G2). Also set a higher speed for the heating
circuit pump (G1), as it needs to run with a higher
speed than the heat transfer medium pump.
POSSIBLE CAUSE 5: INADEQUATE AMOUNT OF
WATER IN THE DOMESTIC HEATING SYSTEM.
B
Fill the heating system and vent if required.
14.9.9 TRIPPED MOTOR CUT-OUT
Fig. 60
POSSIBLE CAUSE 1: OCCASIONAL FAULT OR
ELECTRICITY NETWORK OVERLOADED.
B
Select
Acknowledge
.
B
Wait until the heat pump starts again.
POSSIBLE CAUSE 2: AMPERAGE (A) SET TOO LOW AT
THE OVERLOAD RELAY.
B
Change setting to its correct value.
POSSIBLE CAUSE 3: CONTACTOR, OVERLOAD RELAY
OR ELECTRICAL CONNECTION FAULT.
B
Check components for faults.
POSSIBLE CAUSE 4: COMPRESSOR FAULT.
B
Check the compressor function.
14.9.10 HEAT PUMP NOT CONNECTED
Communication error between the internal unit and the
heat pump.
B
Check CAN-BUS.
14.9.11 FAULT AT THE I/O BOARD, INTERNAL UNIT
CONTROL BOARD
Internal communication error in the internal unit.
B
Check whether the LED at the I/O board is flashing.
14.9.12 TRIPPED MOTOR CUT-OUT FAN
Fig. 61
POSSIBLE CAUSE 1: OCCASIONAL FAULT OR
ELECTRICITY NETWORK OVERLOADED.
B
Select
Acknowledge
.
B
Wait until the heat pump starts again.
B
Notify customer service if the alarm occurs frequently.
Possible cause 2: Power supply to the fan failed.
B
Contact the dealer.
14.10 WARNING WINDOW
14.10.1 HIGH TEMPERATURE DIFFERENCE HEAT
TRANSFER FLUID
Fig. 62
This warning window is displayed when the temperature
difference between sensors T8 and T9 becomes too
high.
PROBABLE CAUSE 1; INSUFFICIENT FLOW OVER THE
HEAT PUMP:
B
Select
Acknowledge
.
B
Check whether the primary heating circuit pump has
stopped (
Æ
Fig. 53, [1], page 41)..
B
Check that all the valves are open. The thermostat
valves in heating systems should be fully open and in
floor heating systems at least half of the coils should
be fully open.
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