38
Exit low ambient cooling
mode
,
run with high fan
for 1 minute
Low
30
27
23
off
7.4.3.2 Heating mode
For M3OD-27HRDN1-M:
For M2OC-18HFN1-M,M2OD-18HFN1-M,M3OC-
30HRFN1-M, M4OC-36HRFN1-M:
T4
E
DC_FAN_SSLOW_SPD_ADD
D
DC_FAN_SLOW_SPD_ADD
C
DC_FAN_MIN_SPD_ADD
B
DC_FAN_MID_SPD_ADD
A
DC_FAN_HI_SPD_ADD
21℃
19℃
18℃
16℃
15℃
13℃
12℃
10℃
7.4.4 Electronic Expansion Valve (EXV)
Control
1.EXV will be fully closed when turning on the
power. Then EXV will be standby with 350P 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 350P open
and will open to target angle after compressor
starts.
3.The action priority of the EXVs is A-B-C-D.
4.Compressor and outdoor fan start operation
only after EXV is initialized.
7.4.4.1 Cooling mode
The initial open angle of EXV is 250P, adjustment
range is 100-350p. When the unit start to work for
3 minutes, the outdoor will receive indoor units( of
capacity demand) T2B information and calculate
the average of them. After comparing each
indoor’s T2B with the average, the outdoor gives
the following modification commands:
If the T2B
＞
average, the relevant valve needs
more 16p open;
If the T2B= average, the relevant valve’s open
range remains;
If the T2B
＜
average, the relevant valve needs
more 16p close.
This modification will be carried out every 2
minutes.
7.4.4.2 Heating mode
The initial open angle of EXV is 250P, adjustment
range is 100-350p.. When the unit start to work
for 3minutes, the outdoor will receive indoor
units( of capacity demand) T2 information and
calculate the average of them. After comparing
each indoor’s T2 with the average, the outdoor
gives the following modification commands:
If the T2
＞
2, the relevant valve needs
more 16p close;
If 2≥the T2≥ average-2, the relevant
valve’s open range remains;
If the T2
＜
average-2, the relevant valve needs
more 16p open.
This modification will be carry out every 2 minutes.
7.4.5 Four-way valve control
In heating mode, four-way valve is opened. In
defrosting, four-way valve operates in according
to defrosting action. In other modes, four-way
valve is closed. When the heating mode to other
modes, the four-way valve is off after compressor
is off for 2 minutes. Failure or protection (not
including discharge temperature protection, high
and low pressure protection), four-way valve
immediately shuts down.
Summary of Contents for M2OC-18HFN1-M
Page 19: ...8 Wiring Diagrams 8 1 Wiring diagram of 1 drive 2 outdoor M2OC 18HFN1 M M2OD 18HFN1 M...
Page 20: ...PCB board of M2OC 18HFN1 M M2OD 18HFN1 M...
Page 21: ...IPM board of M2OC 18HFN1 M...
Page 22: ...IPM board of M2OD 18HFN1 M...
Page 23: ...8 2 Wiring diagram of 1 drive 3 outdoor M3OD 27HRDN1 M M3OC 30HRFN1 M...
Page 24: ...PCB board of M3OC 30HRFN1 M...
Page 25: ...IPM board of M3OC 30HRFN1 M...
Page 26: ...PCB board of M3OD 27HRDN1 M...
Page 27: ...IPM board of M3OD 27HRDN1 M...
Page 28: ...8 3 Wiring diagram of 1 drive 4 outdoor M4OC 36HRFN1 M...
Page 29: ...PCB board of M4OC 36HRFN1 M...
Page 30: ...IPM board of M4OC 36HRFN1 M...
Page 31: ...PFC board of M4OC 36HRFN1 M...
Page 66: ...IPM for dual tri zone IPM for qua zone P N for dual tri zone...
Page 67: ...P N for qua zone...
Page 68: ...bridge rectifier for dual tri zone bridge rectifier for qua zone...
Page 69: ...Remark Measure the DC voltage between and port The normal value should be 190V 250V...
Page 71: ...Two ports of the inductance Inductance...
Page 72: ......
Page 77: ......
Page 79: ......
Page 81: ......
Page 83: ......
Page 96: ...6 EXV check Disconnect the connectors...
Page 98: ...Red Blue Red Yellow...
Page 99: ...Brown Orange Brown White...
Page 114: ...Screws of front panel Screws of right rear panel Screws of top cover...
Page 128: ......
