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Power failure
The heat pump maintains all its settings in case of a power failure. When
the power returns the heat pump automatically starts up according to the
previous settings.
Possible cause: One or two phases to the heat pump are down.
Action: 1. Check that the fuses in the house’s distribution
box have not blown.
2. Change the fuse if necessary. If you have miniature
circuit-breakers and these have tripped you reset
them by pushing up the toggle switch.
3. The heat pump automatically returns to the
operating mode once the fault has been rectifi ed.
3-phase incorrect
Possible cause 1: One or two phases to the heat pump are down.
Action: 1. Check that the fuses in the house’s distribution
box have not blown.
2. Replace the fuse if necessary. If you have miniature
circuit-breakers and these have tripped you reset
them by pushing up the toggle switch.
3. The heat pump automatically returns to the
operating mode once the fault has been rectifi ed.
Possible cause 2: Phase sequence to the heat pump is incorrect.
(The alarm may only be rectifi ed by an electrician.)
Action: 1. Press the Ackn. button.
2. Switch the phase sequence on the incoming supply.
The heat pump starts automatically once the phase
sequence has been switched.
High heat distribution system delta T8/T9 (GT8/GT9)
The heat pump gives an alarm when the temperature difference between
the sensors T8 (GT8) and T9 (GT9) is too high.
Possible cause 1: Not enough fl ow over the heat pump.
Action: 1. Check that the heat carrier pump has not jammed.
2. Check that all the valves are open. The thermostat
valves in heating systems should be fully open and
in fl oor heating systems at least half of the coils
should be fully open.
Possible cause 2: The particle fi lter on the hot side is clogged.
Action: 1. Clean the particle fi lter.
What to do if a fault occurs
If the power does not return on all
phases at the same time during
external electrical work, there is a risk
that the Rego control unit gives a false
alarm for a phase sequence error.
Note
ALARM
Power failure
040622 16.08.15
Info Ackn.
ALARM
Phase incorrect
040622 16.08.15
Info Ackn.
ALARM GT8/GT9
High HTF delta
040622 16.08.15
Info Ackn.
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