38
BRAN H
GB 03/2009
FAULT
CAUSE
SOLUTION
Values display indication
Er35
High water outlet temperature
Alarm with automatic reset
Check water outlet temperature
Check water flow
Check water temperature Set Point
Check correct positioning of sensor BT2
Values display indication
Er47
HSW11 communication error with remote
keypad (only if remote keypad featured)
Check electrical connection
Values display indication
Er 48
Anti-Legionella cycle not completed
Contact the authorised service centre
Values display indication
Er75
Pressure transducer malfunction
Check electrical connection (see unit wiring
diagrams)
Replace the component
Values display indication
Er81
Compressor maintenance interval
Check operating pressure
Check condition of the compressor
Reset the clock
Values display indication
Er85
Water pump maintenance interval
Check condition of the water pumps
Reset the clock
Values display indication
Er90
Maximum alarm log size exceeded
Reset alarm log
Values display indication
Er61
Faulty BT2 water outlet sensor
(automatic reset)
Check electrical connections
Replace component
Values display indication
Er68
Outside air sensor BT3 malfunction
(automatic reset)
Check electrical connections
Replace component
Values display indication
Er60
Faulty BT1 water return sensor
(automatic reset)
Check electrical connections
Replace component
SHUTTING DOWN FOR LONG PERIODS
A
After deactivating the heat pump:
- Make sure the remote switch SA1 is open, or alternatively
disconnect the unit from the power supply.
- Make sure the remote keyboard (if present) is set to
“OFF”.
- Place QF1 in the OFF position (see wiring diagram).
- Deactivate the indoor terminal units by placing the switch
of each unit in the “OFF” position.
- Close the water valves.
If the outside temperature
may fall below zero; there is
the risk of freezing.
The water circuit MUST BE EMPTIED AND CLOSED (if
draining after operation in heat pump mode, beware that
the water may be hot), or antifreeze must be added in
the proportion recommended by the manufacturer.
It is recommended to use non-toxic food grade
antifreeze, compliant with the standards in force in the
countries where the unit is used, if domestic hot water
production is also featured.
If the mains switc
h is turned to “OFF” for more than
four hours, after turning it on and before reactivating the
unit, leave the power on but the unit deactivated for at
least two hours to preheat the oil in the compressor
sump.
Values display indication
Er66
Faulty domestic hot water sensor BT4
Check electrical connections
Replace component
