Service Functions; Change In Defrost Setting; Pre-Heat Control; Pre-Heat Control Setting - Mitsubishi Electric MUZ-AP25VG - E1 Service Manual

11

SERVICE FUNCTIONS

MUZ-AP25VG MUZ-AP35VG
MUZ-AP25VGH MUZ-AP35VGH MUZ-AP42VGH MUZ-AP50VGH

11-1. CHANGE IN DEFROST SETTING

Changing defrost finish temperature
<JS> To change the defrost finish temperature, cut/solder the JS wire of the outdoor inverter P.C. board.
(Refer to 12-6-1.)
Jumper wire
Soldered (Initial setting)
JS
None (Cut)

11-2. PRE-HEAT CONTROL SETTING

PRE-HEAT CONTROL

When moisture gets into the refrigerant cycle, it may interfere the start-up of the compressor at low outside temperature.
The pre-heat control prevents this interference. The pre-heat control turns ON when the discharge temperature thermis-
tor is 20°C or below. When the pre-heat control turns ON, the compressor is energized. (About 50 W)
Pre-heat control setting
<JK>
ON: To activate the pre-heat control, cut the JK wire of the inverter P.C. board.
OFF: To deactivate the pre-heat control, solder the JK wire of the inverter P.C. board.
(Refer to 12-6.1)
NOTE: When the inverter P.C. board is replaced, check the jumper wires, and cut/solder them if necessary.
OBH789
MUZ-AP42VG
Defrost fi nish temperature (°C)
5
10
30
MUZ-AP50VG