R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02
60 Troubleshooting
2. PCB parts instructions
2.1 SW2 query instructions
No.
Content
Note
0
Normal display
----
1
Running mode
0-Standby;2-Cooling;3-Heating;4-Forced Cooling
2
Fan speed
0-OFF
3
Capacity requirement of indoor unit
----
4
Capacity requirement of revised outdoor unit
----
5
T3 pipe temperature
Actual value
6
T4 environment temperature
Actual value
7
T5 discharge temperature
If more than one hundred, only display hundred s
’ and tens digits.
8
The surface temp era ture of the cooling fin
----
9
Opening degree of EXV
Actual value=Display value×8
10
Actual current value
Actual value
11
DC gener atrix voltage
Actual value
12
T2/T2B average temperature
Actual value
13
Quantity of indoor units
Actual value
14
Running quantity of indoor units
Actual value
15
Model
----
16
Priority mode
----
17
Version of the program
18
The last fault or protection code
19
Display “--”
Remark:
1) Normal display: Display frequency of compressor when capacity needing.
2)
Running mode: 0──Standby; 2──COOLING; 3──HEATING; 4──FORCED COOLING.
3)
Fan speed: 0──OFF; 1~7──Speed increasing in turn.
4) SW1: Forced cooling button.
SW2: Query button.
IRMCF341
UPD78F0537
Function setting
dial switch
LED digital
tube display
SW1:
Forced
cooling
button
SW2: Query
button
