Carrier MMY-MAP1204FT9UL - Page 175

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(A)
Ye s Ye s
Ye s
Ye s
Ye s Ye s
Ye s
No
No No
No
No
Yes
No
No
No
[P04]
Check code
CauseCheck code name
Error concerning high-pressure SW
1. High-pressure SW error, 2. Service valve closed 3. Pd sensor error, 4. Indoor/outdoor fan error 5. Indoor/outdoor PMV choke 6. Indoor/outdoor heat exchanger clogging, air short circuit, 7. SV2 circuit error 8. SV4 circuit error, 9. SV5 circuit error 10. Discharge line check valve malfunction 11. Refrigerant overcharge
Sub-code:
01: Compressor 1, 02: Compressor 2, 03: Compressor 3
Note) High-pressure SW is normally closed. (B contact)
Does high-pressure SW
operate?
Are parts
of highpressure SW
normal?
Is service valve fully
opened?
Are
characteristics of
high-pressure sensor
normal?
Does cooling outdoor
fan normally operate?
Is there any
interference of hea-
texchanging of outdoor unit?
1. Heat exchanger clogging
2. Air short circuit
Is there any crack or coming-off of fan?
Connector connection, fan IPDU, fan motor, wiring
Connectors: PMV1: CN300, PMV2: CN301, PMV4: CN303
Check parts. Failure → Replace
Open service valve
fully.
Replace the highpressure sensor.
Repair faulty parts.
Repair outdoor PMV. Eliminate the interference.
Check A3-IPDU P.C. board. Failure → replace
(B) All cooling operation
All cooling →To (B) All heating → To (C)
Reset power supply, and start a test operation corresponded to the season.
Is outdoor PMV normal?
1. Connector connection
2. Cabling, 3. Coil
4. Valve body
5. Outdoor I/F P.C. board
ABNORMAL ABNORMAL ABNORMAL
NORMAL
NORMAL NORMAL
Yes
No
Is circuit cabling
normal?
Check and correct cabling.
Is
Cooling/Heating FS
unit normal?
Repair Cooling/Heating FS unit.
Check
incorrect piping of discharge
gas/suction gas
main piping.
Correct piping to normal piping.
Check
PMV4, SV12 valve
operation.
Replace defective parts.
ABNORMAL ABNORMAL
NORMAL NORMAL
No
No
No
No
No
No No
No
Ye s Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
No
No
(C)
(A)
Is SV2 circuit normal?
Is SV4 circuit normal?
Does heating
indoor fan normally
operate?
Are connector
connection, condenser,
fan motor and fan
normal?
Is connector connection
and coil normal?
Is there clogging
on any valve?
Are
characteristics
of TC2 and TCJ sensor
resistance value
normal?
Is indoor PMV
normal?
(Check it using the miswiring check function of the outdoor unit.)
Are any indoor units
of different refrigerant
line connected?
Is there
any interference of
heatexchanging of indoor unit?
1. Filter clogging
2. Heat exchanger clogging
3. Air short circuit
Repair SV2 circuit.
Repair SV4 circuit. (Coil error, clogging, disconnection of wiring, etc.)
Repair faulty parts.
Repair faulty parts.
Eliminate the interference. Check and correct the wiring. Replace TC2 and/or TCJ sensor.
Refrigerant overcharge, clogging, pipe breakage, abnormal overload condition
Check indoor P.C. board. Failure → Replace
All heating operation
Refrigerant overcharge, clogging, pipe breakage, abnormal overload condition
Coil error, clogging, disconnection of wiring, etc.
Repair faulty parts.
Replace 4-way valve.
Replace defective parts.
Check
4-way valve operation.
Check
SV11 circuit clogging.