Mitsubishi Electric PUMY-P112VKM1, Руководство по обслуживанию

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Check code
1501
Refrigerant shortage trouble
Abnormal points and detection methods Causes and check points
(1) Abnormal when all of the following conditions are satisfied:
1. The compressor is operating in HEAT mode
2.Discharge super heat is 80 or more.
3.Difference between TH7 and the TH3 applies to the formula of
(TH7−TH3 < 5
)
4.The 63HS detects below 2.04 MPa.
(2) Abnormal when all of the following conditions are satisfied:
1.The compressor is in operation
2.When cooling, discharge superheat is 80 or more
When heating, discharge superheat is 90 or more.
The High-pressure sensor detects below 2.32 MPa
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 : Electronic 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 restart?
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 balve) fully.
Repair the refrigerant leak.
Connect the connector properly
(Repair or replace it in case of a breakage).
(leaking)
(5104)
(no leaking)
(1501)
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