The Following Occurrences Are Not Problems Or Errors; System Control; System Settings - Mitsubishi Electric PEH-P8MYA Manuel D'installation

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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

13.2. The following occurrences are not problems or errors

Problem
The fan setting changes during heating.
The fan stops during heating.
When the switch is turned ON, the fan does
not begin to operate.
The outdoor unit fan turns in reverse or stops,
and an unusual sound is heard.
Note:
If the fan in the indoor unit does not operate, check the over-current relay on the fan motor to determine whether it has been tripped.
If the over-current relay has been tripped, reset it after eliminating the cause of the problem (e.g. motor lock).
To reset the over-current relay, open the control box and press the green claw on bottom-right of the relay until a click is heard. Release the claw and check that
it returns to its original position.
Note that if it is pressed too hard it will not return to its original position.

14. System control

14.1 System settings

[Fig. 14.1.1] (P.10)
A Outdoor unit
B Indoor unit
C Master remote controller
D Subordinate remote controller
E Standard 1:1 (Refrigerant address = 00)
* Set the refrigerant address using the DIP switch of the outdoor unit.
1 Wiring from the Remote Control
This wire is connected to TB5 (terminal board for remote controller) of the indoor
unit (non-polar).
2 When a Different Refrigerant System Grouping is Used
Up to 16 refrigerant systems can be controlled as one group using the slim MA
remote controller.
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, light air or low air operation will take place.
During thermostat ON mode, light air or low air will switch automatically to set notch on
the basis of time or piping temperature.
During defrosting, the fan will stop.
After the switch is turned to ON or until the piping temperature reaches 35°C, there will
be 5 minutes of light air operation. After that there will be 2 minutes of low air operation,
then set notch will begin (hot adjustment control).
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.
Note:
In single refrigerant system, there is no need of wiring 2.
SW1
Function table
1 Compulsory de-
<SW1>
2 Error history clear
SW1
ON
3
OFF
function
1 2 3 4 5 6
4
settings
5
6
Control mode
Indoor unit Outdoor unit
←
Ordinary
←
Hot adjustment
←
Defrosting
←
—
←
Heater ON
←
Freeze prevention
←
Surge prevention
←
Compressor OFF
Cause
Operation according to switch setting
Function
ON
Start
frosting
Clear
Settings for outdoor unit ad-
Refrigerant sys-
dresses 0 to 15
tem address set-
ting
OFF
Normal
Normal
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