Samsung MH020FPEA Service Manual page 177

Troubleshooting
I In case of MANUAL ADDRESSING mode. (SW02-1:OFF)
I
2. Checking the address number correctly on each indoor unit PCB.
I
2. - "PIPE CHECK MODE" is also able to use.
G If Error code is displayed on indoor or outdoor LED, check as follows;
Confirm power cable connection,
especially miss-wiring between
communication cable and
power cable.
AC power line could be
connected to outdoor
communication terminal,
F1&F2. So check the wiring not
only communication line but
also power line.
RAC(MH✳✳✳FPEA✳ /
MH✳✳VP2-✳✳)
indoor PCB
RAC(MH✳✳✳FWEA /
MH✳✳VW2-✳✳)
indoor sub PCB
12-4 12-4
SW01 setting number and the number of
indoor unit installed are the same.
Yes
Some indoor unit has no power.
Error code E101 or E185 is displayed on
Yes
Error code E460 is displayed on
Error code E401, E404 or E416 is
displayed on outdoor unit LED.
In case of communication error by
wrong wiring on the indoor unit,
all indoor units display an error code.
In this case, correction at the wrong point
could solve all indoor unit error display.
1-Way cassette
(MH✳✳✳FKEA)
indoor PCB
Address number switch
0 0
0 0
Duct(MH✳✳✳FEEA)
indoor PCB
Yes
No
indoor unit LED
No
outdoor unit LED.
No
No
Duct(MH✳✳✳FDEA)
0
Yes
SW01 setting number must same
as the number of indoor unit.
Yes
Check communication wire and
power wire connection.
Check PIPE connection,
Yes
because gas flow to a different
indoor unit will cease these error.
indoor PCB
0
Samsung Electronics