REMKO ML 263 DC - Manual (Page 47)

Fault E1: Communication error between outdoor and indoor unit
Switch the unit off for 5 seconds. Is the fault still
shown on the display?
YES
Check all connecting lines between the indoor
unit and the outdoor unit and check that the
connections to the circuit boards comply with
the circuit diagram. Are all cables properly con-
nected?
YES
Measure the voltage on the S and N terminals
of the outdoor unit. Is +24 V present on these?
NO Has the wiring to the indoor unit been correctly
implemented?
YES YES
Has the wiring to the outdoor unit been cor-
rectly implemented?
Replace the indoor unit control board.
YES
Replace the outdoor unit motherboard.
NO
Has the fault cleared?
Fault E2: Phase monitoring has tripped
Is all cabling correctly connected and is the
supply voltage present at the outdoor unit?
NO
Renew all electrical connections if necessary.
YES
The indoor unit control board is defective.
Please replace.
47