U= user, I= installer
Not all configurations are selectable at the same time. For more information contact the manufacturer.
9.26 Alarms
9.26.1 Flow switch E06
The water side flow switch is pre-installed in the unit and MUST NEVER be tampered with or bypassed. The flow switch is bypassed for a
time of 10 seconds when the unit is switched on. The alarm is signalled after 5 seconds of error persistence (lack of water flow, air in the
circuit, etc.). The alarm has an automatic rearming function the 2 times and resets after 5 seconds. If the alarm occurs more than 3 times in
an hour, it must be reset manually.
9.26.2 High temperature E18
The alarm is tripped if the water output probe gives a reading of more than 65°C for at least 50 seconds. It is deactivated when the
temperature drops back below 62°C.
9.26.3 Antifreeze E05
The alarm is activated if the output water probe reading is below 4°C. It is deactivated if the probe temperature reading rises back above
+7°C.
9.26.4 Probe alarms
The alarm is tripped if any of the probes connected and enabled is short-circuited or interrupted.
The alarm is also tripped if the probe upper limit (100°C) or lower limit (-50°C) is passed.
A probe configured as a probe for domestic hot water, does not provide an alarm if domestic hot water is not enabled.
9.26.5 Inverter timeout E80
If the controller does not communicate with the compressor driver PCB, a timeout alarm is tripped to avoid losing control of the system.
9.26.6 Remote ON/OFF E00
If the unit is controlled by a remote digital input.
9.26.7 High pressure E01
The alarm is tripped if the pressure transducer on the unit gives a pressure reading of more than 41 bar.
In this case the compressor is shut down at once. The alarm resets when the pressure drops below 37 bar.
If the alarm occurs more than 3 times in an hour, it must be reset manually.
9.26.8 High pressure switch HP (in series with compressor delivery line probe) E64
The alarm is tripped if the pressure switch on the unit gives a pressure reading of more than 44 bar.
In this case the compressor is shut down at once. The alarm resets when the pressure drops below 31 bar.
9.26.9 Low pressure E02
The alarm is tripped if the pressure transducer on the unit gives a pressure reading below the value set on the controller (A16=5 bar default,
1.5 bar in “heat” mode) In this case the compressor is shut down at once. The alarm resets when the pressure rises back above the threshold
of 2.0 bar.
If the alarm occurs more than 3 times in an hour, it must be reset manually.
9.27 No voltage
When power supply is restored:
1. the device returns to its status before the blackout
2. if a defrosting cycle is in progress it is aborted
3. all timers running are cleared and restarted.
9.28 User cutout alarm table
r29 Temperature offset
for hot water tank
and system heaters
first set point (G02)
°C 0 0...100 I
r30 Temperature offset
for hot water tank
and system heaters
second set point
(G05)
°C 0 0...100 I
r31 Temperature offset
for hot water tank
and domestic hot
water heaters (G03)
°C 0 0...100 I
Type of failure Code Compressor Pump Heaters Fan
Remote off E00
OFF OFF OFF OFF
Inverter hardware problem E75
OFF OFF
Compressor overcurrent E76
OFF OFF
Voltage out of range E78
OFF OFF
Inverter high temperature dissipator E77
OFF OFF
Parameter Description Unit Default Range Visibility Permitted settings Notes
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