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-MUP0801*, 1001*, 1201*, 1401*)
Clogging
Part
Location of
Problem
(Refer to next page)
Unit generating
check code Detected problem and check code Symptom
Outdoor PMV1, 2 A Corresponding unit Activation of high-pressure protection
Activation of low-pressure protection
Discharge temp. trouble (TD1)
P20
H06
P03
Rise of pressure
Fall of pressure
Rise of discharge temp.
(Compressor 1)
Outdoor PMV4 B Corresponding unit Discharge temp. trouble (TD1) P03 Rise of discharge temp.
(Compressor 1)
Check valve in discharge pipe
convergent section
C Corresponding unit High-pressure protection trouble
High-pressure SW system trouble
P20
P04-01
Abnormal rise of pressure
Inverter heat sink J Corresponding unit Heat sink overheating trouble P07-01 Rise of IPM (TH) temp.
(Compressor 1)
Outdoor PMV1, 2 A Corresponding unit Outdoor liquid backflow trouble
Oil level low detection and protection
P13
H07
Refrigerant entrapment
Outdoor PMV4 B Corresponding unit Outdoor liquid backflow trouble
Oil level low detection and protection
P13
H07
Oil level low
SV41 valve I Corresponding unit Discharge temp. trouble (TD1) P03 Rise of discharge temp.
(Compressor 1)
4-way valve K Corresponding unit 4-way valve reversing trouble
Gas leak detection
P19
P15
Incorrect internal position
of 4-way valve
Check valve in discharge pipe
convergent section
C Corresponding unit Oil level low detection and protection
Compressor breakdown
Compressor trouble (lockup)
H07
H01-01
H02-01
Refrigerant entrapment
Other connected
unit
Discharge temp. trouble (TD1) P03 Rise of discharge temp.
(Compressor 1)
Oil-equalization circuit
Capillary or Strainer
E Corresponding unit Oil level detection circuit trouble
Oil level low detection and protection
H16-01
H07
Oil circuit trouble or
Oil level low
SV3D valve F Corresponding unit Oil level low detection and protection H07 Oil level low
SV3D valve circuit Capillary
or Strainer
G Corresponding unit Oil level low detection and protection H07 Oil level low
SV3F valve or SV3F valve
circuit Strainer
H Corresponding unit Oil level low detection and protection H07 Oil level low
SV41 valve I Corresponding unit High-pressure protection trouble P20 Rise of pressure
Leakage
Part
Location of
Problem
(Refer to next page)
Unit generating
check code Detected problem and check code Symptom
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