Mitsubishi Electric City Multi PUMY-SP125VKM User Manual

Check code
Abnormalpointsanddetectionmethods Causesandcheckpoints
Thepurposeofthecheckcodeistopreventindoorunitfromfreezingor
dewcondensationwhichiscausedwhenarefrigerantkeepsowinginto
the unit in STOP.
Abnormalwhenallofthefollowingconditionsaresatised:
1.ThecompressorisoperatinginCOOLmode.
2.15minuteshavepassedafterthestartupofthecompressor,orthe
changeinthenumberofoperatingindoorunitsismade(includinga
change by turning thermo-ON/OFF).
3.Afterthecondition2aboveissatised,thethermistorofindoorunit
in STOP detects TH22j
[
−5 [23°F]for5consecutiveminutes.
Wrongpipingconnectionbetweenindoorunitand
branchbox
Miswiringbetweenindoorunitandbranchbox
MiswiringofLEVinbranchboxorindoorunit
Malfunction of LEVinbranchboxorindoorunit
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
1503
(P6)
Freezeprotectionofbranchboxorindoorunit
No
Yes
Connectthepipingandwiringtothesame
port.
No
Is there a resistance detected?
ConnecttheLEVwiringtotheintended
portproperly.
DisconnecttheLEVwiringofbranchbox
or indoor unit to check the resistance.
ReplacetheLEVcoil.
Checktheportwhichthepipingand
wiringbetweentheindoorunitand
branchboxisconnected.
Isthepipingandwiringconnected
tothesameport?
ChecktheportwhichtheLEVwiring
ofbranchboxisconnected.
Isthewiringconnectedtothesame
portasthecorrespondingbranch
box?
Yes
No
ReplacetheLEVassyinbranchboxor
the LEV of indoor unit that is not
connectingviabranchbox.
Yes
ConnecttheLEVwiringproperly.
ChecktheLEVwiringofindoorunit
thatisnotconnectingviabranchbox
isconnectedproperly.
Yes
No
62
63
OCH668B

Mitsubishi Electric City Multi PUMY-SP125VKM Specifications

General

Series	City Multi
Outdoor Unit Model	PUMY-SP125VKM
Cooling Capacity	12.5 kW
Heating Capacity	14.0 kW
Refrigerant	R410A
Operating Temperature (Cooling)	-5 to 46 °C
Indoor Unit Compatibility	Compatible with various City Multi indoor units
Power Supply	380-415V, 50Hz, 3-Phase
Operating Temperature (Heating)	-15°C to 24°C