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8-9. Leakage/Clogging of Refrigerating Cycle Circuit
List of Check Codes Generated upon Occurrence of Leakage/Clogging in Outdoor Cycle or Oil
Circuit Part
(MMY-MUP0721*, MUP0961*, MUP072H1*)
Clogging
Part
(Refer to next page)
Outdoor PMV1, 2
Outdoor PMV4
Check valve in discharge pipe
convergent section
Oil-equalization circuit
Capillary or Strainer
SV3D valve
SV3D valve circuit Capillary
or Strainer
SV3F valve or SV3F valve
circuit Strainer
SV41 valve
SV5B valve
Inverter heat sink
Leakage
Part
(Refer to next page)
Outdoor PMV1, 2
Outdoor PMV4
Check valve in discharge pipe
convergent section
SV41 valve
4-way valve
Unit generating
Location of
Problem
check code
A
Corresponding unit
B
Corresponding unit
C
Corresponding unit
E
Corresponding unit
F
Corresponding unit
G
Corresponding unit
H
Corresponding unit
I
Corresponding unit
J
Corresponding unit
K
Corresponding unit
Unit generating
Location of
Problem
check code
A
Corresponding unit
Other connected
unit
B
Corresponding unit
C
Corresponding unit
I
Corresponding unit
L
Corresponding unit
Detected problem and check code
Activation of high-pressure protection
Activation of low-pressure protection
Discharge temp. trouble (TD1)
Discharge temp. trouble (TD1)
High-pressure protection trouble
High-pressure SW system trouble
Oil level detection circuit trouble
Oil level low detection and protection
Oil level low detection and protection
Oil level low detection and protection
Oil level low detection and protection
High-pressure protection trouble
High-pressure protection trouble
Outdoor heat exchanger freeze
trouble
Heat sink overheating trouble
Detected problem and check code
Outdoor liquid backflow trouble
Oil level low detection and protection
Discharge temp. trouble (TD1)
Outdoor liquid backflow trouble
Oil level low detection and protection
Oil level low detection and protection
Compressor breakdown
Compressor trouble (lockup)
Discharge temp. trouble (TD1)
4-way valve reversing trouble
Gas leak detection
- 237 -
Symptom
P20
Rise of pressure
H06
Fall of pressure
P03
Rise of discharge temp.
(Compressor 1)
P03
Rise of discharge temp.
(Compressor 1)
P20
Abnormal rise of pressure
P04-01
H16-01
Oil circuit trouble or
H07
Oil level low
H07
Oil level low
H07
Oil level low
H07
Oil level low
P20
Rise of pressure
Rise of pressure
P20
Decreased defrost
P11
performance
P07-01 Rise of IPM (TH) temp.
(Compressor 1)
Symptom
P13
Refrigerant entrapment
H07
P03
Rise of discharge temp.
(Compressor 1)
P13
Oil level low
H07
H07
Refrigerant entrapment
H01-01
H02-01
P03
Rise of discharge temp.
(Compressor 1)
P19
Incorrect internal position
P15
of 4-way valve
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Troubleshooting
