Toshiba MMD-AP0076BHP1-E Service Manual page 78

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
Description System status
of
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
– –
78
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
P.C. board (I/F).
under SH control.
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.
Check resistance
least 10 minutes is repeated
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).