REMKO SuperTec-Monitor - Manual (Page 23)

Fault code Meaning Cause Remedial measures
F1
Phases reversed, power supply,
polarity reversed on connection
and control cables to the indoor
unit
1. Three seconds after switching
on the power supply, a phase
fault is detected.
2. Four minutes after switching
on the power supply, reverse
polarities are detected on the
supply and control cables.
Control cables to S1, S2, S3
reversed (TB4), note polarity.
Phases L1, L2, L3 reversed
(TB1), note polarity.
Cables reversed at the terminals
for supply voltage TB1 and
control cables TB4.
Check connection and polarity at
the terminals.
Swap phases L1 and L2 at TB1.
Check wiring and correct.
F2
L3-phase open
If a phase fault is detected on
L3 two seconds after switching
on the power supply, fault
message "F2" is issued
Open phase on L3. Check wiring and correct.
F3
Low pressure switch 63L
If the circuit of low pressure
switch 63L does not report a
contact for over 3 mins after
applying the supply voltage,
fault message "F3" is issued
Poor or detached contacts
on the 63L connector on the
control board of the outdoor
unit, or connector unplugged.
Poor or detached contacts on
63L.
63L was triggered due to a lack
of refrigerant or by defective
components.
Control board defective.
Check contacts on the 63L
connector on the control board
and repair.
Check contacts and cable on 63L
and repair.
Check refrigerant level.
Test electrical components.
Replace defective components.
Replace defective control board.
F5
High pressure switch 63H
If the circuit of high pressure
switch 63H reports a contact
for over 3 mins after applying
the supply voltage, fault
message "F5" is issued.
Poor or detached contacts
on the 63H connector on the
control board of the outdoor
unit, or connector unplugged.
Poor or detached contacts on
63H.
63L was triggered due to
defective components.
Control board defective.
Check contacts on the 63H
connector on the control board
and repair.
Check contacts and cable on
63H and repair.
Test electrical components.
Replace defective components.
Replace defective control board.
F7
Phase fault on the control
board.
If no signal is being generated
by the phase measuring circuit
three seconds after switching
on the power supply, fault
message "F7" is issued.
Control board defective. Replace defective control board.
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