Operation Modes And Functions - North American HVAC MOC-12HFN1-MS0W Service Manual

Electrical Control Function

1.3 Operation Modes and Functions

1.3.1 Fan mode
( 1) Outdoor fan and compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low/auto.
(4) The louver operates same as in cooling mode.
(5) Auto fan:
For 12-18K units, MUE-24HRFN1-MW, MTB-24HRFN1-MW, MCD-24HRFN1-MW:
For other units:
1.3.2 Cooling Mode
1.3.2.1 Electronic Expansion Valve (EXV) Control(Excluding MOC-12HFN1-MS0W,
MOF-18HFN1-MS0W)
For MOC-12HFN1-MV0W，MOZ-12HFN1-MW0W, MOF-18HFN1-MU0W:
1.EXV will be fully closed when turning on the power. Then EXV will be standby with 480P open and will
open to target angle after compressor starts.
2.EXV will close with -160P when compressor stops. Then EXV will be standby with 480P open and will
open to target angle after compressor starts.
3. The initial open angle of EXV is 220P, adjustment range is 80-480p. The unit starts to work for 3 minutes
then adjusting open angle according to the temperature of compressor discharge every 2 minutes.
For MOG-24HFN1-MT0W:
1.EXV will be fully closed when turning on the power. Then EXV will be standby with 480P open and will
108
3.5
High
3.0
Medium
1.5
1.0
Low
Ts=24
5.0
High
4.0
Medium
3.0
2.0
Low
Ts=24
Electrical Control System