– 82 –
FILE NO. SVM-
16041
P13
P13
I/F
Outdoor liquid
backflow
detection error
All stop
<During cooling operation>
When system is in cooling
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.
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.
P15
P15
01: TS
condition
I/F
Gas
leakdetection
(TS1 condition)
All stop
Protective shutdown due to
sustained suction
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
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
02: TD
condition
I/F
Gas leak
detection
(TD condition)
All stop
Protective shutdown due to
sustained discharge
temperature (TD1, TD2 or
TD3) at or above 108 ”C for at
least 10 minutes is repeated
four times or more.
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).
P17
P17
I/F
Discharge
temperature
TD2 error
All stop
Discharge temperature (TD2)
exceeds 115 ”C.
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).
P18
P18
I/F
Discharge
temperature
TD3 error
All stop
Discharge temperature (TD3)
exceeds 115 ”C.
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).
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Sub-code
Check
code
Main
remote
controller
