Mitsubishi Electric City Multi PUMY-SP125VKM User Manual

Check code
1501
(U2)
Refrigerant shortage trouble
Abnormal points and detection methods Causes and checkpoints
(1)Abnormalwhenallofthefollowingconditionshavebeensatisedfor
15 consecutive minutes:
1.ThecompressorisoperatinginHEATmode.
2.Dischargesuperheatis80: [144
_
F]ormore.
3.DifferencebetweenTH7andTH3appliestotheformulaof
(TH7−TH3<5:[9
_
F])
4.Thesaturationtemperatureconvertedfromahighpressuresensor
detectsbelow35:[95
_
F].
(2)Abnormalwhenallofthefollowingconditionshavebeensatised:
1.Thecompressorisinoperation.
2.Whencooling,dischargesuperheatis80: [144
_
F]ormore,and
thesaturationtemperatureconvertedfromahighpressuresensoris
over−40:[−40
_
F].
3.Whenheating,dischargesuperheatis90:[162
_
F]ormore.
Defectiveoperationofstopvalve(notfullyopen)
Defective thermistor
Defective outdoor multi controller circuit board
IndoorLEVperformancefailure
Gas leakage or shortage
Defective 63HS
TH3 :Thermistor<Outdoorliquidpipe>
TH7 : Thermistor <Ambient>
LEV :Linearexpansionvalve
63HS:Highpressuresensor
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
Chart 1 of 2
Yes
No
No
No
No
Yes
Yes
Yes
Istheoutdoorstopvalve(ball
valve)fullyopen?
Is there a refrigerant leak?
Is5104displayedwhenrestarted?
Is there any abnormality on
connectors such as a disconnection,
half-disconnection or breakage?
Refer to the diagnosis of check code 5104.
Checkrelevantthermistorwiringsand
connector contacts of the outdoor multi
controller circuit board.
Disconnectthethermistorwiringandcheck
the resistance.
Openthestopvalve(ballvalve)fully.
Repairtherefrigerantleak.
Connecttheconnectorproperly
(Repairorreplaceitincaseofabreakage).
(leaking)
(5104)
(no leaking)
(1501)
Continuetothenextpage
59
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