Service Functions - Mitsubishi Electric MXZ-2C20NA2 Service Manual

11

SERVICE FUNCTIONS

MXZ-3C24NA MXZ-3C30NA
MXZ-2C20NA2 MXZ-3C24NA2
MXZ-2C20NA3 MXZ-3C24NA3
MXZ-2C20NA4 MXZ-3C24NA4
MXZ-2C20NAHZ MXZ-3C24NAHZ
MXZ-2C20NAHZ2 MXZ-3C24NAHZ2 MXZ-3C30NAHZ2
MXZ-2C20NAHZ3 MXZ-3C24NAHZ3 MXZ-3C30NAHZ3
MXZ-2C20NAHZ4 MXZ-3C24NAHZ4 MXZ-3C30NAHZ4
11-1. PRE-HEAT CONTROL
If moisture gets into the refrigerant cycle, or when refrigerant is liquefied and collected in the compressor, it may interfere
the startup of the compressor.
To improve start-up condition, the compressor is energized even while it is not operating.
This is to generate heat at the winding.
The compressor uses about 50 W when pre-heat control is turned ON.
Pre-heat control is ON at initial setting.
[How to deactivate pre-heat control]
Turn OFF the power supply for the air conditioner before making the setting.
Set the "4" of SW2 on the outdoor control P.C. board to ON to deactivate pre-heat control function.
Outdoor control P.C. board
Turn ON the power supply for the air conditioner.
NOTE: Pre-heat control will be turned OFF when the breaker is turned OFF.
OBH702N
MXZ-4C36NA
MXZ-3C30NA2
MXZ-3C30NA3
MXZ-3C30NA4
MXZ-3C30NAHZ
SW871
MXZ-5C42NA
MXZ-4C36NA2
MXZ-4C36NA3
MXZ-4C36NA4
LED
107
MXZ-5C42NA2
MXZ-5C42NA3
MXZ-5C42NA4