Nibe AMB 30, Installer Manual

Page: 40 / 52

Troubleshooting
The following tips can be used to rectify comfort dis-
ruption:
Basic actions
Start by checking the following possible fault sources:
႑
That the heat pump/air collector module is running
or that the supply cable to AMB 30 is connected.
႑ Group and main fuses of the building.
႑
The building's earth circuit breaker.
႑
The air collector module's miniature circuit breaker
(FA1).
AMB 30 is not operational
The control system has not given the start
signal. Cause:
Check that the heat pump is operating. Action:
Fuses have tripped. Cause:
Replace the fuse or reset the MCB. If the
fuse trips again the installation engineer
should be contacted. Action:
Outdoor temperature is colder than set
value in menu "BT28 min.". Indicated as
"Low BT28" in the control unit. Cause:
Wait until the outdoor temperature is
higher than the set stop value (menu
"Low BT28"). Action:
Outdoor temperature hotter than 50 °C.
Indicated as "High BT28" in the control
unit. Cause:
Wait until the outdoor temperature is
below 48 °CC. Action:
Fan stopped. Cause:
Ensure that the air flow is not blocked. If
the fault remains contact the installation
engineer. Action:
The alarm is acknowledged automatically when the
fault is rectified or according to the instructions on
page 36.
Interference when defrosting
AMB 30 does not defrost. Cause:
Check that the reversing valve (QN20)
functions and is correctly connected. Action:
AMB 30 does not defrost completely. Cause:
Increase set temperature in menu
"Stop active". Action:
AMB 30 Chapter 10 | Disturbances in comfort 38