is still visible and a menu called “alarm” is visible in the display, the
problem causing the alarm still remains. If the alarm initially disappears
and then returns, you should contact your installer.
aid mode “aid mode” is a type of emergency mode. This means that
the heat pump produces heat and/or hot water even though there is
some kind of problem. This could mean that the heat pump’s compressor
is not running. In this case, the immersion heater produces heat and/or
hot water.
Caution
Selecting "aid mode” is not the same as correcting the problem
that caused the alarm. The status lamp will therefore continue
to be red.
If the alarm does not reset, contact your installer for suitable remedial
action.
NOTE
Always state the product’s serial number (14 digits) when re-
porting a fault.
Troubleshooting
If the operational interference is not shown in the display the following
tips can be used:
BASIC ACTIONS
Start by checking the following possible fault sources:
• The switch's position.
• Group and main fuses of the accommodation.
• Earth-fault breaker.
LOW HOT WATER TEMPERATURE OR A LACK OF HOT
WATER
• Closed or throttled externally mounted filler valve for the water heater.
– Open the valve.
• Heat pump in incorrect operating mode.
73Chapter 4 | Disturbances in comfortNIBE F730
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