Toshiba MMD-AP0071SH-C Service Manual page 78

Check code
Outdoor 7-segment display
Main
remote central control
controller Check code remote controller
Sub-code
P07 P07 01: Compressor
1 side
02: Compressor
2 side
P10 P10 Indoor address
with trouble
P12 — —
P13 P13 —
01: TS condition
P15 P15
02: TD condition
Detected Check code
Status
AI-NET
position name
1C IPDU Heat sink All stop
I/F overheat error
Ob Indoor Indoor All stop
overflow error
11 Indoor Indoor fan Corresponding
motor error unit only stops.
47 I/F Outdoor liquid All stop
back
detection
error
AE I/F Gas leak All stop
detection
(TS1
condition)
AE I/F Gas leak All stop
detection
(TD condition)
Error detection condition
IGBT built-in temp sensor (TH) • Check power voltage.
was overheated.
• Check outdoor fan system error.
• Check clogging of heat sink cooling duct.
• Check fixation between IGBT and heat sink. (Check screwing and contact.)
• Check IPDU error.(IGBT built-in temp sensor (TH) error).
• Float switch operated. • Check the float switch connector.
• Float switch circuit • Check operation of drain pump unit.
disconnected or the
• Check the drain pump circuit.
connector came off.
• Check clogging of drain pipe.
• Check indoor P .C. board error.
• Check connection of fan connector and wiring.
• The value of motor speed
deviated from target value
• Check fan motor error.
was detected for certain time.
• Check indoor P .C. board error.
• Over-current protection
• Check influence of outside air control.
operated.
• Check indoor type code (DN=10) and the capacity code (DN=11).
<In heating> • Check full close operation of outdoor PMV (1, 2).
While the system is operating • Check Pd and Ps sensor error.
in HEAT mode, outdoor PMV of
• Check clogging of SV2 circuit.
which opening degree was 100
• Check clogging of 4-way valve error circuit.
pulse or less for a certain time.
• Check outdoor P .C. board (I/F) error.
• Check capillary clogging of oil return circuit from oil separator.
• Check TS1, TS2 sensor error.
• Check refrigerant shortage.
Suction temp exceeded the
judgment standard temp for 10
• Check full open of outdoor service valves (gas side, liquid side).
minutes or more.
• Check outdoor PMV clogging (PMV1, 2).
• Check characteristics of TS1 sensor resistance value.
<TS error judgment standard
• Check 4-way valve error.
temperature>
• Check leakage of SV4 circuit.
In cooling operation: 60°C or
higher • Check leakage of SV5 circuit.
• Check mispiping of discharge gas/suction gas main pipe.
In heating operation: 40°C or
higher • Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between
FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
Discharge temperature TD1 or • Check refrigerant shortage.
TD2 was continuously 108°C
• Check outdoor PMV clogging (PMV1, 2).
or higher for 10 minutes.
• Check characteristics of TD1, TD2 sensor resistance value.
• Check indoor air filter clogging.
• Check pipe clogging.
• Check SV4 circuit (Valve leakage, misinstallation)
• Check mispiping of discharge gas/suction gas main pipe.
• Check Flow selector unit.
Check leakage of SVD valve and SVS valve. (Check leakage of SVDD valve and SVSS.)
Check mispiping of FS unit connecting pipe (Suction gas/Discharge gas), wiring between
FS unit and indoor unit, and connection of connectors.
Check miswiring of SVS/SVD valves.
Check item (position)