Mitsubishi Electric City Multi PUMY-SP112YKM User Manual

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Abnormalpointsanddetectionmethods Causesandcheckpoints
AbnormalifovercurrentofDCbusorcompressorisdetectedafter30
secondssincethecompressorstartsoperating.
Closedoutdoorstopvalve
Decreaseofpowersupplyvoltage
Looseness,disconnection,orwrongphaseof
compressorwiringconnection
Model selection error on indoor controller board or
outdoor multi controller circuit board
Defectivecompressor
Defectiveoutdoorpowercircuitboard
Defective outdoor multi controller circuit board
Malfunction of indoor/outdoor unit fan
Short-cycle of indoor/outdoor unit
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
4210
(UP)
Compressorovercurrentinterruption
Chart 1 of 2
Yes
Yes
Yes
No
No
No
Isthestopvalve (liquid/gas) fully
open?
Isthepowersupplyvoltagenormal?
Aretheysetproperly?
Openthestopvalve (liquid/gas) fully.
• Check the looseness, disconnection, or
breakageofcompressorwiring.
•Ensurepowersupplyfromthefacility.
(Checkforpowersupplyopenphase.)
Set the model selection correctly.
Checktheoutdoorstopvalve.
Checkwhetherthepowersupplyvoltageis
normal or not.
Checkifthemodelselectionswitchisset
correctly on the indoor controller board or
outdoor multi controller circuit board.
TurnthepowerOFFtocheckfor
looseness,disconnection,orwrongphases
ofthecompressorwiring.
Continuetothenextpage
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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