Mitsubishi Electric Mr.Slim MXZ-2B20NA, Руководство по обслуживанию

Страница: 30 / 40

30
The other cases
Indoor unit does not operate. (different operating models in multi system)
• When you try to run two indoor units simultaneously, one for cooling and the other for heating, the unit which
transmits signal to the outdoor units first decides the operation mode.
• When the above situation occurs, set all the indoor units to the same mode, turn OFF the indoor units, and
then turn them back ON.
• Though the top of the indoor unit sometimes gets warm, this does not mean malfunction. The reason is that
the refrigerant gas continuously flows into the indoor unit even while it is not operating.
• When the operation frequency does not go up from the lowest frequency.
Check of bus-bar voltage
•Check the voltage of power supply.
•Confi rm outdoor unit failure mode
recall function. (Refer to 11-2.2.)
Blink 5 times
Confi rm LED1 indication lamp on
the outdoor electronic control P.C.
board.
Replace the power board.
Blink 9 times
Replace the outdoor elec-
tronic control P.C. board.
Turn OFF power supply before removing P.C. board.
Confi rm LED1 indication lamp
on the outdoor electronic con-
trol P.C. board.
Turn ON power supply. Start
operation.
Blink 6 times
Replace the outdoor elec-
tronic control P.C. board.
Lighting
Replace the outdoor elec-
tronic control P.C. board.
Blink 9 times
Replace the power board.
Confi rm LED1 indication lamp
on the outdoor electronic con-
trol P.C. board.
Turn ON power supply. Start
operation.
Normal
Lighting Lighting