Mitsubishi Electric City Multi PUMY-SP112YKM User Manual

Check code
Abnormal points and detection methods Causes and checkpoints
Abnormalifserialcommunicationbetweentheoutdoormulticontroller
circuitboardandoutdoorpowercircuitboardisdefective.
WirebreakageorcontactfailureofconnectorCN2or
CN4
Malfunctionofcommunicationcircuittopowercircuit
board on outdoor multi controller circuit board
Malfunction of communication circuit on outdoor
powercircuitboard 
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
0403
(Ed)
Serial communication error
No
Yes
Are they connected normally?
Check the connection of the communication
line(CN2andCN4)betweentheoutdoormulti
controllercircuitboardandpowercircuit
board.
ConnecttheCN2andCN4properly.
Replacethemincaseofabreakage.
The communication circuit of either the
outdoor multi controller circuit board or
powercircuitboardisdefective.
Ifunabletoidentifythedefectivecircuit;
Replacetheoutdoormulticontroller
circuit board if it does not recover.
Replacetheoutdoorpowercircuitboard.
50
51
OCH668B

Mitsubishi Electric City Multi PUMY-SP112YKM Specifications

General

Series	City Multi
Outdoor Unit Model	PUMY-SP112YKM
Cooling Capacity (kW)	11.2
Heating Capacity (kW)	12.5
Refrigerant	R410A
Operating Temperature Range (Cooling)	-5°C to 46°C
Power Source	380-415V, 50Hz
Operating Temperature Range (Heating)	-20°C to 15.5°C
Indoor Unit Compatibility	Various models in the City Multi series