Item
Operation mode/relay output
Outdoor unit control condition
Indoor unit control
condition
Indoor unit control
condition
Error code history 1
Error code history 2
Display contents
tens place
O: stop
C: cooling
H: heating
d: defrosting
units place
1: SV1
Relay output = SV1 + 21S4 + 52C
2: 21S4
4: 52C
Ex. During cooling mode, when 52C and
SV1 are ON: C5
When an error occurs, the error
code and error signal (*1) are
displayed in alternation.
Control mode display system
The error code (ex. U8, UA) and error indicator (*1) are displayed in alter-
nation.
• Depending on the position of the SW2 switch on the outdoor unit board, the segments light up to indicate the running
condition of the unit and the particulars of the check code.
SW2 setting
123456
000000
011110
010110
110110
011100
111100
*1 Display system for error indicator
The indicator corresponds to the following numbers
0 .......... Outdoor unit
1 .......... Indoor unit No.1
2 .......... Indoor unit No.2
3 .......... Indoor unit No.3
4 .......... Indoor unit No.4
Indoor unit No.1
Indoor unit No.3
Outdoor unit
Indoor unit No.2
Indoor unit No.4
(IC1)
(IC2)
Control mode
Indoor unit
Ordinary
Hot adjustment
Defrosting
—
Heater ON
Freeze prevention
Surge prevention
Compressor OFF
Display
0
1
2
3
4
5
6
7
Outdoor unit
←
←
←
←
←
←
←
←
(IC3)
(IC4)
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