The Following Occurrences Are Not Problems Or Errors - Mitsubishi Electric PUH-8 Installation Manual

• 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
Operation mode/relay output
000000
011110 Outdoor unit control condition
010110
Indoor unit control condition
110110
Indoor unit control 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

11.3. The following occurrences are not problems or errors

Problem
The fan setting changes during heating.
(PEH-8, 10)
The fan stops during heating.
When the switch is turned ON, the fan does
not begin to operate. (PEH-8, 10)
The outdoor unit fan turns in reverse or stops,
and an unusual sound is heard.
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 alternation.
Remote controller display
Ordinary display
Defrosting display
Heating preparations
underway
Ordinary display
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
2
Indoor unit No.1
3
Indoor unit No.3
4
Outdoor unit
5
6
7
During thermostat OFF mode, low speed air operation will take place.
During thermostat ON mode, low speed air will switch automatically to set notch (fan
speed) on the basis of time or piping temperature.
During defrosting, the fan will stop.
After the switch is turned ON, low speed air will take place, for 7 minutes (or after pipe
temperature reaches 35°C, 2 minutes) before automatically switch to set notch (fan
speed).
(Hot adjustment)
There is a risk of the power to the outdoor unit being connected in reverse phase. Be
sure to check that the phase is correct.
Control mode
Indoor unit Outdoor unit
Ordinary ←
Hot adjustment
←
Defrosting ←
— ←
Heater ON ←
Freeze prevention ←
Surge prevention ←
Compressor OFF ←
Cause
15