Toshiba MMY-MAP0804HT8P-E - Page 205

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No
(Check with miswiring check function of outdoor unit.)
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Yes
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Cleaning Cleaning
[H06]
e
suaCedo
c
kcehC Check code name
Low-pressure protective operation
1. Service valve close 2. Ps sensor error
3. SV2, SV4 circuit error
4. Miswiring of communication between indoor and
outdoor
5. Indoor/outdoor fan and condenser error
6. Indoor/outdoor PMV clogging 7. Indoor/outdoor heat exchanger clogging
8. Refrigerant shortage
Are
service valves of
gas and liquid pipe of
outdoor unit fully
opened?
Are
characteristics of
low-pressure sensor
normal?
Are SV2 and SV4
circuits normal?
Is any indoor unit
in a different line
connected?
Does indoor
fan normally operate
in cooling season?
Is there
clogging of indoor air filter
or heat exchanger?
Is indoor PMV
normal?
Is outdoor fan
normally operated in
heating season?
Is there
clogging of outdoor heat
exchanger?
Is outdoor PMV
normal?
Is connector
connection or coil
normal?
Is there clogging
on whole valve?
Are
following items
concerned to indoor fan
motor normal?
1. Connector connection
2. Condenser
3. Motor
4. Fan
Open service valves fully.
Exchange low-pressure sensor. Correct SV2 and SV4
circuits. Correct wiring. Repair faulty parts.
Check indoor P.C. board.
Failure
Replace
Refrigerant shortage or clogging or pipe deformed
Repair faulty parts.
Repair faulty parts.
Refrigerant shortage,
clogging, pipe deformed
Replace PMV body.
Check outdoor I/F P.C. board. Failure
Replace
In cooling season, go to (A)
In heating season, go to (B)
(A) Cooling
(B) Heating
Check miswiring, misinstallation and connector connection.
* 1. Pressure by pressure gauge (Check joint) 2. Pressure display on 7-segment display 3. Output voltage of I/F P.C. board
If 1 and 2, 3 are different, an error of pressure sensor error is considered.
If 2 and 3 are different, check I/F P.C. board.
Is indoor fan system normal?
• Fan crack
• Fan coming-off
[H05]
Yes
Yes
No
No
esuaCedoc kcehC Check code name
Outdoor discharge temperature sensor (TD1) misconnection
1. Coming-off of TD1 sensor 2. Misinstallation of TD1, TD2, or TD3 sensor,
miswiring, characteristics error of resistance value
Is there no
miswiring or
misinstallation on
TD1/TD2/ TD3
sensors?
Are resistance
characteristics of TD1
sensor normal?
Correct miswiring/misinstallation. TD1: CN502, white
TD2: CN503, pink TD3: CN504, blue
No
Yes
Is TD1 sensor
installed correctly?
Correct installation of sensor.
Check I/F P.C. board.
Sensor error
Replace the sensor.