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Testing operations
1. Check the power supply between the outdoor unit and the auxiliary circuit breaker.
• 1 phase power supply : L, N
2. Check the Indoor unit
1) Check that you have connected the power and communication cables correctly. (If the power cable and
communication cables one mixed up or connected incorrectly, the PCB will be damaged.)
2) Check the temp. sensor, water pump, and display are connected correctly.
3. Press K1 or K2 on the outdoor unit PCB to run the test mode and stop.
KEY
KEY operation
7-segment display
K1
Press once : Heating test run
" " " " "BLANK" "BLANK"
Press twice : Defrost test run
" " " " "BLANK" "BLANK"
Press 3times : Finishing test mode
-
K2
Press once : Cooling test run
" " " " "BLANK" "BLANK"
Press twice : Finishing test mode
-
K3
Reset
K4
View mode
Refer to View mode display
ON
1 2 3 4
5 6 7 8
4. View Mode : When the K4 switch is pressed, you can see information about our system state as below.
Number of
press
Display contents
Display
Units
Segment 1
Segment 2
Segment 3
Segment 4
0
Communication State
10s digit of Tx
1s digit of Tx
10s digit of Rx
1s digit of Rx
1
Order frequency
1
100s digit
10s digit
1s digit
Hz
2
Current frequency
2
100s digit
10s digit
1s digit
Hz
3
Type of Outdoor unit
(Mono/Split)
3
0
0
0 : split
1 : mono
4
Outdoor air sensor
4
+ / -
10s digit
1s digit
°C
5
Discharge sensor
5
100s digit
10s digit
1s digit
°C
6
PHE (Eva) sensor
6
+ / -
10s digit
1s digit
°C
7
Cond sensor
7
+ / -
10s digit
1s digit
°C
8
Current
8
10s digit
1s digit
First decimal
A
9
Fan RPM
9
1000s digit
100s digit
10s digit
rpm
Setting the option switch and function of the keys