79
Check code name
[H04] / [44]
(Current code / AI-NET)
[H14] / [44]
(Current code / AI-NET)
Check code name
Compressor 1 case thermo operation
Compressor 2 case thermo operation
Cause of operation
1. Case thermo circuit error
2. I/F P.C. board error
3. Service valve closed
4. Outdoor PMV clogging
5. SV4 valve leak, Coil misinstallation
6. 4-way valve error
7. Compressor error
8. Refrigerant shortage
(Note 1)
1. Case thermo is usually closed.
2. Operation temperature of case thermo is 120˚C.
(After checking there is no slogging or pipe breakage, charge refrigerant again.)
(Note 2)
Check the following items mainly.
1. Existence of abnormal sound and abnormal vibration during operation at start time
2. Abnormal overheat of case during operation or stop (Never touch with hands.)
3. Current of compressor lead during operation or starting (No rapid current change)
SV4 valve: Connector CN311, Blue
Connector CN300, 301, White
Is compressor normal? (Note 2)
Repair case thermo circuit.
Are service valves of
gas pipe and liquid pipe of
outdoor unit fully opened?
Does not refrigerant
bypass from discharge of
suction through 4-way valve?
Refrigerant shortage,
clogging, pipe breakage
Is case thermo circuit normal?
1. Connector connection
2. Cabling
3. I/F P.C. board
(Note 1)
Open service valves fully.
Repair outdoor PMV.
Correct SV4 valve circuits.
Check 4-way valve.
Compressor error
Operation starts.
Are outdoor PMV1/2 normal?
1. Connector connection
2. Cabling
3. Coil
4. Valve body
5. I/F P.C. board
Are SV41 and
Valve circuits normal?
1. Misinstallation installation and
connector connection of SV41
and SV42
2. Leakage from SV41, 42 circuit
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
FILE NO. SVM-05052
Summary of Contents for MMK-AP0072H
Page 125: ...TOSHIBA CARRIER CORPORATION ...
