R410A All DC Inverter Mini VRF MCAC-VTSM-2016-02
60 Troubleshooting
2. PCB Parts Instructions
SW2 query instructions
No.
Content
Note
0
Normal display
Frequency will display when running, quantities of indoor
unit will display when standby.
1
Operating mode
0
—Standby; 2—Cooling; 3—Heating; 4—Forced cooling
2
Operating fan speed grade
0
—Power off
3
The total required capacity of the indoor unit
----
4
The required capacity of the revised outdoor unit
----
5
T3 piping temperature
Actual value
6
T4 environment temperature
Actual value
7
T5 discharge temperature
Actual value(if it is more than one hundred, it will be only
display the hundreds’ digit and the tens’ digit)
8
The surface tempertature of the radiator
Actual value
9
EXV opening degree
Actual Value=Display value*8
10
Current value
Actual value
11
Voltage AD value
Actual value
12
T2 average temperature
Actual value
13
Total quantities of the indoor units
Actual value
14
The quantities of the operating indoor units
Actual value
15
Model
----
16
Priority mode
----
17
Version of the program
----
18
The last fault or protection code
I
f there is no fault or protection code it will be display “nn
19
Display “--”
---
UPD78F0537A
24LC256
LED digital
tube display
SW2: Query
button
SW1: Forced
cooling button
SW4: Function
setting
SW3: Priority
mode
Содержание MDV-120W/DON1
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