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
To select aid mode an alarm action must be selected in the
menu 5.1.4.
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
You need the product's (14 digit) serial number for servicing
and support.
Troubleshooting
If the operational interference is not shown in the display the following
tips can be used:
BASIC ACTIONS
Start by checking the following items:
• The switch's position.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
• Correctly set load monitor (if current sensors installed).
LOW HOT WATER TEMPERATURE OR NO HOT WATER
• Mixing valve (if there is one installed) set too low.
77Chapter 4 | Disturbances in comfortNIBE F1255
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