REMKO CMF 320 Duo - Manual (Page 29)

Troubleshooting and customer service
The unit has been manufactured using state-of-the-art production methods and tested several times to ensure
its correct function. However, in the event that malfunctions should occur, the device should be checked against
the following list. Please inform your dealer if the unit is still not working correctly after all of the functional
checks have been performed.
Fault Possible causes Remedial measures
The heat pump does
not start or switches
itself off
Power outage, under-voltage
Check the voltage and, if necessary, wait for it
to come back on
Defective mains fuse
Master switch off
Exchange mains fuse, master switch on
Damaged mains cable Repair by specialist firm
Power company off-period
Wait until the power-company off-period is
over and the heat pump starts up as required
Operational temperature limits too
low or too high
Observe temperature ranges
Set-point temperature exceeded
Incorrect mode
The set-point temperature has to be higher
than the heat-source temperature, check mode
Clamp fault
Control cable S1-S2-S3-PE
Disconnect the outdoor module, then establish
the correct clamp order using the connection
plan Re-establish voltage to the outdoor
module. Also make sure that the protective
earth is connected correctly.
Heat circuit pump
fails to switch off
Incorrect pump switching
Arrange to have pump switching checked in
"heating circuit" expert level
Heat circuit pumps
fail to switch on
Incorrect mode set Check mode
Control PCB fuse in indoor module
switching cabinet faulty
Exchange the fuse on the left side of the control
PCB
Incorrect heating program set
Check heating program We recommend the
operating mode "heat" in the cold heating
season
Temperature overlapping, e.g.
external temperature greater than
room temperature
Observe temperature ranges
Troubleshooting
A corresponding error code
appears on the heat pump
manager display in the event
of a fault in the heating system.
The meanings of the displayed
error codes can be taken from
the table on the next page.
The system should be restarted
after a brief shut-down after the
fault has been rectified (turn the
mode switch off then on again). Subsequently the heat-pump
manager will re-start, automatically
reconfigure and continue to
operate with the set values.
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