Mitsubishi Electric PUH-P8MYA Technical & Service Manual page 55

• 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 Operation mode/relay output
011110 Outdoor unit control condition
Indoor unit control
010110
condition
Indoor unit control
110110
condition
011100 Error code history 1
111100 Error code history 2
*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
Item
tens place
units place
When an error occurs, the error
code and error signal (*1) are
displayed in alternation.
Control mode display system
(IC1)
(IC2)
Indoor unit No.2
Indoor unit No.4
(IC3)
(IC4)
The error code (ex. U8, UA) and error indicator (*1) are displayed in alter-
nation.
Display contents
O: stop
C: cooling
H: heating
d: defrosting
1: SV1 Relay output = SV1 + 21S4 + 52C
2: 21S4
4: 52C
Ex. During cooling mode, when 52C and
SV1 are ON: C5
Display
0
1
Indoor unit No.1
Indoor unit No.3 2
Outdoor unit
3
4
5
6
7
–53–
Control mode
Indoor unit Outdoor unit
←
Ordinary
←
Hot adjustment
←
Defrosting
←
—
←
Heater ON
←
Freeze prevention
←
Surge prevention
←
Compressor OFF