22
10-1. 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
11-6-1.)
Jumper wire
Defrost fi nish temperature (
°C
)
MUZ-GF
60VE
71VE
JS
Soldered (Initial setting)
10
10
None (Cut)
18
18
10-2. PRE-HEAT CONTROL SETTING
PRE-HEAT CONTROL
Prolonged low load operation, in which the thermostat is OFF for a long time, at low outside temperature (0°C or less)
may cause the following troubles. To prevent those troubles, activate the pre-heat control.
1) If moisture gets into the refrigerant cycle and freezes, it may interfere the start-up of the compressor.
2) If liquid refrigerant collects in the compressor, a failure in the compressor may occur.
The pre-heat control turns ON when the compressor temperature is 20°C or below. When the pre-heat control turns ON,
the compressor is energized. (About 70 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 11-6.1)
NOTE:
When the inverter P.C. board is replaced, check the jumper wires, and cut/solder them if necessary.
MUZ-GF60VE MUZ-GF71VE
SERVICE FUNCTIONS
10
OBH635C
