Toshiba MMY-MAP0804HT8JP Service Manual page 188

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
P13 P13 –
01: TS condition
P15 P15
02: TD condition
P17 P17 –
P18 P18 –
Location
of Description System status
detection
I/F Outdoor liquid All stop
backflow
detection error
I/F Gas All stop
leakdetection
(TS1 condition)
I/F Gas leak All stop
detection
(TD condition)
I/F Discharge All stop
temperature
TD2 error
I/F Discharge All stop
temperature
TD3 error
– 187 –
Error detection
Check items (locations)
condition(s)
<During cooling operation> • Check full-close operation
When system is in cooling of outdoor PMV (1, 2, 4).
operation, high pressure is • Check for defect in Pd or
detected in follower unit that Ps sensor.
has been turned off. • Check gas balancing
<During heating operation> circuit (SV2) for clogging.
When system is in heating • Check balance pipe.
operation, outdoor PMV 1 or • Check SV3B circuit for
2 continuously registers clogging.
opening of 100p or less while • Check defect in outdoor
under SH control. 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.
Protective shutdown due to • Check for insufficiency in
sustained suction refrigerant quantity.
temperature at or above • Check outdoor service
judgment criterion valves (gas side, liquid
for at least 10 minutes is side) to confirm full
repeated four times or more. opening.
<TS error judgment criterion> • Check PMVs (PMV1, 2) for
In cooling operation: 60°C clogging.
In heating operation: 40°C • Check resistance
characteristics of TS1
sensor.
• Check for defect in 4-way
valve.
• Check SV4 circuit for
leakage
Protective shutdown due to • Check for insufficiency in
sustained discharge refrigerant quantity.
temperature (TD1, TD2 or • Check PMVs (PMV 1, 2)
TD3) at or above 108 °C for at for clogging.
least 10 minutes is repeated • Check resistance
four times or more. 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).
Discharge temperature (TD2) • Check outdoor service
exceeds 115°C. 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).
Discharge temperature (TD3) • Check outdoor service
exceeds 115°C. 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).