1.15 Faults
The heat pump continuously monitors a number of parameters. If any parameter is out of range, the control unit
activates the alarm and generates an error message, which is registered in the ALARMS menu.
If there is a malfunction, the heat pump will not allow the compressor to start. To indicate the presence of a fault,
the button illuminates continuously in red and the operating mode EMERGENCY STOP is activated
automatically.
Depending on the type of problem, different situations may arise.
Active alarms
Active alarms indicate malfunctions occurring at this time. At the beginning of the ALARMS menu, successive
menu windows are displayed, showing the text with the reason for the alarm. The button illuminates
continuously in red and is displayed in the menu window .
If the problem is corrected, these alarms will be cleared and the heat pump will continue to operate automatically.
The button then flashes red to indicate that an error has occurred but has been corrected. When the alarm
register is opened, the button will no longer illuminate.
Locked due to repeated alarms
There are a number of critical malfunctions in the operation of the heat pump, in which a permanent shutdown
is activated if the malfunctions are repeated more often than 5 times a day. The button illuminates
continuously in red and is displayed in the menu window .
Even after eliminating the problem, such a lock must be manually removed from the ALARMS menu so that the
heat pump can be put into operation again.
Register of historical alarm data
The ALARMS menu contains a historical data register that contains information about the last 50 errors.
In the event of a malfunction of the heat pump, the electric hot water heater must be
activated from the rotary switch in the electrical cabinet.
In case of malfunction of the heat pump, the electric emergency heating of the heat pump
must be activated on the heat pump display.
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Zehnder ComfoBox Q / ComfoHeat User Manual, BA-CBQ_DE-CH V1.0
