Sinclair SDV4 series - Page 60

70 Troubleshooting
26CN63
Loading output terminal (Delay control of DC power)
AC 220V
27CN61
Loading output terminal(crankcase heating control)
AC 220V
28CN57
Loading output terminal(solenoid valve SV6 control)
AC 220V
29CN20
Program terminal connected to the computer
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2. PCB parts instructions
2.1 SW2 query instructions
No.
Content
Note
1
Normal display
----
2
Running mode
0-Standby;2-Cooling;3-Heating;4-Forced Cooling
3
Fan speed
0-OFF
4
Capacity requirement of indoor unit
----
5
Capacity requirement of revised outdoor unit
----
6
T3 pipe temperature
Actual value
7
T4 environment temperature
Actual value
8
T5 discharge temperature
If more than one hundred, only display hundred
s
and
tens digits.
9
Surface temperature of the cooling fin
----
10
Opening degree of EXV
Actual value=Display value×8
11
Actual current value
Actual value
12
AD actual value of voltage
Actual value
13
T2 average temperature
Actual value
14
Quantity of indoor units
Actual value
15
Running quantity of indoor units
Actual value
16
17
The last fault or protection code (if there
is no fault or protection code it will be display “nn”)
Displays
”
- -
”
----
IRMCF341
UPD78F0537A
Function setting
dial switch
LED digital
tube display
SW1:
Forced
cooling
button
SW2: Query
button