Troubleshooting
NOTE
Work behind covers secured by screws may
only be carried out by, or under the supervision
of, a qualified installation engineer.
NOTE
As F2040 can be connected to a large number
of external units, these should also be checked.
NOTE
In the event of action to rectify malfunctions
that require work within screwed hatches the
incoming electricity must isolated at the safety
switch.
Caution
Alarms are acknowledged on the indoor mod-
ule / control module (VVM / SMO).
The following tips can be used to rectify comfort disrup-
tion:
BASIC ACTIONS
First and foremost
Start by checking any alarm messages in the info menu
on the indoor module (VVM) / control module (SMO).
Follow the instructions on the display on the indoor
module (VVM) / control module (SMO).
F2040 not in operation
F2040 communicates all alarms to the indoor mod-
ule/control module (VVM / SMO).
• Ensure that the F2040 is connected to the power
source and that compressor operation is required.
• Check the indoor module/control module (VVM /
SMO). See section "Disturbances in comfort" in the
Installer Manual for the indoor module/control module
(VVM / SMO).
F2040 does not communicate
• Check that the addressing of F2040 is correct.
• Check that the communication cable is correctly con-
nected and working.
Further possible measures
If any components are disconnected from the power.
Start by checking the following items:
• That the heat pump is running or that the supply cable
to F2040 is connected.
• Group and main fuses of the accommodation.
• The property's earth circuit breaker.
• The heat pump’s fuse (F).
NIBE F2040Chapter 9 | Disturbances in comfort48
9 Disturbances in comfort
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