Mitsubishi Electric PRH-P8MYA Technical & Service Manual page 75

(2) T est run start and finish
• Operation from the outdoor-side controller board
Execute settings for test run start,finish and operation mode (cooling, heating) using the DIP switch SW 4 on the
outdoor-side controller board substrate.
<SW4>
OFF
1
2
a) Set the operation mode (cooling, heating) using SW 4-2
b) Turn ON SW 4-1, The operation mode for SW 4-2 will be adhered to, and the test run will commence
c) Turn OFF SW 4-1 to finish the test run
• There may be a faint knocking noise emitted from the proximity of the fan during the test run. This is torque
fluctuation occurring due to control of fan revolutions. There is no problem with the product.
Note:
The SW 4-2 operation mode cannot be changed during the test run. (To change test run mode, stop the equipment
with SW 4-1, change the operation mode, then restart test run with SW 4-1.)
As there are 2 circuits for PRH-P16 and 20MYA, make the same setting on other outdoor-side controller boards.
• If the 2-hour timer is set,the test run will stop automatically after 2 hours.
• During the test run,the room temperature display on the indoor-side will indicate the temperature of the indoor-side
piping.
(3)
How to handle problems with the test run
Error code list: details
Remote controller communication – reception error
Remote controller communication – transmission error
Remote controller communication – reception error
Remote controller communication – transmission error
Communication between indoor-side and outdoor-side controller boards – reception error
Communication between indoor-side and outdoor-side controller boards – transmission error
Communication between indoor-side and outdoor-side controller boards – reception error
Communication between indoor-side and outdoor-side controller boards – transmission error
Connection wiring error (interference, loose)
Connection wiring error (interference, loose)
Excessive time in use
Serial communication error
Serial communication error
Reverse phase, out of phase verification
Faulty input circuit
Duplicated M-NET address setting
M-NET error in PH/W transmission
M-NET bus busy
M-NET communication error with P transmission
M-NET error – no ACK
M-NET error- no response
Undefined error code
Discharge temperature error
CN23 Short-circuit Connector Unplugged
Open/short in discharge temp thermistor
Open/short in liquid temp or condenser/evaporater temp thermistor
Compressor overcurrent interruption (51C operation)
High pressure error (63H1 operation)
Low pressure error (63L operation)
Power synchronous idle circuit error
Inlet sensor error
Piping (liquid pipe) sensor error
Drain sensor error
Drain overflow protector operation
Water leak error
Freeze prevention operation
Surge prevention operation
Piping temperature error
Piping (2-phase pipe) sensor error
ON
Error details Problem location
Remote Controller
Remote Controller
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
M-NET board
Outdoor-side controller board
Outdoor-side controller board
M-NET board
M-NET board
M-NET board
M-NET board
M-NET board
M-NET board
–
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Outdoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
Indoor-side controller board
- 72 -
Remote controller
MELANS display
display
6831,6834 E0
6832,6833 E3
6831,6834 E4
6832,6833 E5
6740,6843 E6
6841,6842 E7
6840,6843 E8
6841,6842 E9
6844 EA
6845 EB
6846 EC
0403 ED
0403 EE
4103 F1
4115 F8
6600 A0
6602 A2
6603 A3
6606 A6
6607 A7
6608 A8
undefined EF
1102
U2
1108 U2
5104 U3
5105 U4
4101 U6
1302 UE
1300 UL
4115 F8
5101 P1
5102 P2
2503 P4
2502 P5
2500 P5
1503 P6
1504 P6
1110 P8
5103 P9