Mitsubishi Electric City Multi PUMY-SP125VKM User Manual

Check code
Abnormal points and detection methods Causes and checkpoints
AbnormalifTH8detectsatemperatureoutsidethespeciedrangeduring
compressoroperation.
TH8:
Thermistor <Heat sink>
Blocked outdoor fan
Malfunction of outdoor fan motor
Blockedairowpath
Riseofambienttemperature
Characteristic defect of thermistor
Malfunctionofinputcircuitonoutdoorpowercircuitboard
Malfunction of outdoor fan driving circuit
●Diagnosisofdefectives
MakesuretoturnthepowerOFFbeforeconnecting/disconnectinganyconnectors,orreplacingboards.
Diagnosis Remedy
Is5110displayedwhenrestart?
4230
(U5)
Heatsinktemperaturetrouble
No
Yes
No
No
Yes
Yes
No
No
Yes
Yes
Is5110displayedwhenrestarted?
Does the fan rotate during
compressoroperation?
Isthereanyobstaclewhich
blocksanairowaroundthe
heat
sink
?
Is there any abnormality such
as a disconnection, looseness or
breakage?
Is the resistance normal?
Refer to the diagnosis of check code 5110.
Refer to the diagnosis of check code 4400.
Replacethethermistor
(Defective thermistor).
Replacetheoutdoorpowercircuitboard
(Defectiveoutdoorpowercircuitboard).
Improvetheairowpath.
Connectthewiring/connectorproperly.
Replaceitincaseofabreakage.
CheckthewiringandconnectorconnectionTH8.
Check the resistance of TH8.
(airpathblocked)
(no obstacle)
TH8temp.-resistancecharacteristic
0  180kΩ
25
 50kΩ
50
 17kΩ
70
 8kΩ
90
 4kΩ
70
71
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