REMKO CMF-80 v.2 - Manual (Page 35)

LED s
LEDs on outdoor module
In the event that the red con-
trol lamp lights up on the indoor
module, then the fault is on the
outdoor module. Two LEDs are vis-
ible after removing the enclosure
panel which light up in green and
red during normal operation (see
adjacent fi gure). If the LEDs fl ash,
then there is a fault. Causes and
measures for their remedy can be
taken from the following table.
green LED red LED Meaning Remedial measures
fl ashes 1 time
fl ashes 1 time
Phase error: The supply cable to the out-
door module or the connection between
the indoor and outdoor modules is not
correct.
Check the electrical connection (swapped
phases)Check connection cable
fl ashes 2 time
One of the connectors has been removed
from the PCB or has intermittent contact Check all connectors on the PCB, check
high and low pressure sensors
fl ashes 3 time Fault on PCB Exchange PCB
fl ashes 2 time
fl ashes 1 time
Wiring error between indoor and outdoor
modules Check connection cable for correct polar-
ity and proper contact
fl ashes 2 time
Data transfer error between indoor and
outdoor modules
Check if the connection cable has been
improperly extended or incorrectly con-
nected
fl ashes 3 time
fl ashes 1 time
Hot gas temperature in refrigerant circuit
too high or hot gas heating too low Check refrigerant; check hot gas tempera-
ture sensor; check expansion valve
fl ashes 2 time
High pressure valve has tripped
Open any closed spherical valves, check
refrigerant fi lling
Low pressure cut-off switch has tripped
Open any closed spherical valves, check
refrigerant fault
No voltage on condenser Check power supply to the condenser
fl ashes 3 time
Overheating protection tripped, excessive
liquid temperature in refrigerant circuit
Clean dirty heat exchanger on outdoor
module; rectify possible pneumatic short
circuit on the outdoor device.
fl ashes 4 time
Overcurrent circuit breaker on condenser
(overload) has tripped, or no operating
voltage on condenser
Open any closed spherical valves; check
supply voltage; exchange faulty PCBs
fl ashes 5 time
Fault in hot gas temperature sensor or fi n
temperature sensor (cable breakage or
short circuit)
Check PCB connector for fi rm connection,
check functionality of the sensor
fl ashes 6 time
Temperature fault on inverter cooling
block Rectify obstruction to fl ow in outdoor
module
fl ashes 7 time Fault in power supply Check and repair power supply
fl ashes 4 time
fl ashes 1 time
Fault on liquid line sensor (cable breakage
or short circuit) Check PCB connector for fi rm connection,
check functionality of the sensor
fl ashes 4 time
Temperature of liquid line too high / too
low Check refrigerant line or lack of refriger-
ant
Flashing code on outdoor
module
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