REMKO SuperTec-Monitor - Manual (Page 29)

Fault code Meaning Cause Remedial measures
U9
Overvoltage or undervoltage
in the inverter and fault in the
serial communication of the
circuit boards.
Drop of the bus voltage below
310 V
Sudden drop of the bus voltage
below 200 V (CMF80/90
CMT100)
below 350 V (CMF140/150
CMT150)
Rise of bus voltage above 420
V ( CMF80/90 CMT140)
above 760 V ( CMF140/150
CMT 150)
Drop in the power consumption
of the outdoor unit to just 0.5
A with an operating frequency
of 40 H� or condenser current
of 5.0 A.
Rise in the supply voltage
(mains).
Wiring detached from the
condenser.
Contactor 52C defective.
Connector CN52C detached or
unplugged.
PFC module on the voltage
board of the outdoor unit
(CMF80/90CMT100) defective
ACT module defective.
ACT circuit defective.
Connector CNAF detached or
unplugged.
Converter circuit on outdoor
unit (CMF140/150CMT150)
defective
52C circuit on the control board
(CMF80/90CMT100) defective
Connector CN5 on the voltage
board detached or unplugged
52C circuit on the voltage
board (CMF140/150CMT150)
defective
Connector CN5 on the voltage
board detached or unplugged
Check supply voltage at the
mains.
Check wiring to the condenser
and voltage board and correct.
Replace defective 52C.
Check fit and wiring of CN52C
and correct.
Replace control board.
Replace ACT module.
Replace voltage board.
Check fit and wiring of CNAF
and correct.
Replace converter board.
Replace control board.
Check fit and wiring of CN5 and
correct.
Replace voltage board.
Check fit and wiring of CN2 and
correct.
UA
Thermal relay 51C was
triggered.
If thermal relay 51C is
triggered, fault message "UA"
is issued.
Shut-off valves closed during
operation.
Fault on the condenser.
Variations in the supply voltage
(mains).
Brief interruption to the supply
voltage (mains).
Shut-off valve fully open.
Check condenser and if
necessary replace.
Check supply voltage (mains).
Ud
Overheating protection
(overload protection, fan motor
fault)
If the line temperature (TH3)
exceeds 70°C, fault message
"Ud" is issued.
In cooling mode: fan motor
defective, air "short-circuit".
Temperature sensor TH3
defective.
Control board defective.
Check fan motor, replace if
defective.
Switch supply voltage off and
back on to check if "U4" will be
displayed when the system starts
back up. If "U4" is displayed, see
"U4".
Check temperature sensor,
replace if defective.
Check control board, replace if
defective.
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