Toshiba MMY-MAP0804HT8-E Service Manual page 190

Outdoor 7-segment display
Main
remote
Check
controller
code
P13 P13
P15 P15
P17 P17
P18 P18
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Check code
Location
AI-NET central
of
control
detection
remote
Sub-code
controller
I/F
– 47
01: TS I/F
condition
AE
02: TD I/F
condition
AE
I/F
– bb
I/F
–
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Description System status
Outdoor liquid All stop <During cooling operation>
backflow When system is in cooling
detection error operation, high pressure is
detected in follower unit that
has been turned off.
<During heating operation>
When system is in heating
operation, outdoor PMV 1 or
2 continuously registers
opening of 100p or less while
under SH control.
Gas All stop Protective shutdown due to
leakdetection sustained suction
(TS1 condition) temperature at or above
judgment criterion
for at least 10 minutes is
repeated four times or more.
<TS error judgment criterion>
In cooling operation: 60°C
In heating operation: 40°C
Gas leak All stop Protective shutdown due to
detection sustained discharge
(TD condition) temperature (TD1, TD2 or
TD3) at or above 108 °C for at
least 10 minutes is repeated
four times or more.
Discharge All stop Discharge temperature (TD2)
temperature exceeds 115°C.
TD2 error
Discharge All stop Discharge temperature (TD3)
temperature exceeds 115°C.
TD3 error
189
Error detection
Check items (locations)
condition(s)
• Check full-close operation
of outdoor PMV (1, 2, 4).
• Check for defect in Pd or
Ps sensor.
• Check gas balancing
circuit (SV2) for clogging.
• Check balance pipe.
• Check SV3B circuit for
clogging.
• Check defect in outdoor
P.C. board (I/F).
• Check capillary of oil
separator oil return circuit
for clogging.
• Check for leakage of check
valve in discharge pipe
convergent section.
• Check for insufficiency in
refrigerant quantity.
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check PMVs (PMV1, 2) for
clogging.
• Check resistance
characteristics of TS1
sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for
leakage
• Check for insufficiency in
refrigerant quantity.
• Check PMVs (PMV 1, 2)
for clogging.
• Check resistance
characteristics of TD1, TD2
and TD3 sensors.
• Check indoor filter for
clogging.
• Check piping for clogging.
• Check SV4 circuit (for
leakage or coil installation
error).
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check outdoor PMVs
(PMV1, 2, 4) for clogging.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for
leakage.
• Check SV4 circuit (for
wiring or installation error
involving SV41, SV42 and
SV43).
• Check outdoor service
valves (gas side, liquid
side) to confirm full
opening.
• Check outdoor PMVs
(PMV1, 2, 4) for clogging.
• Check resistance
characteristics of TD3
sensor.
• Check for defect in 4-way
valve.
• Check SV43 circuit for
leakage.
• Check SV4 circuit (for
wiring or installation error
involving SV41, SV42 and
SV43).