– 143 –
Check code
Location
of
detection
System status
Description
Error detection
condition(s)
Check items (locations)
Outdoor 7-segment display
Main
remote
controller
Check
code
Sub-code
I/F
F31
—
F31
All stop *1
Outdoor P.C. board
(I/F) does not
operate normally.
• Check power supply voltage.
• Check power supply noise.
• Check for defect in outdoor P.C. board
(I/F).
Outdoor
EEPROM error
IPDU
01:
Compressor 1 side
02:
Compressor 2 side
03:
Compressor 3 side
H01
H01
All stop
Inverter current
detection circuit
detects overcurrent
and shuts system
down.
• Check power supply voltage.
(FT9 : 208/230V ± 10%, FT6 : 460V ± 10%).
• Check for defect in compressor.
• Check for possible cause of abnormal
overloading.
• Check for defect in outdoor P.C. board
(A3-IPDU).
Compressor
breakdown
IPDU
01:
Compressor 1 side
02:
Compressor 2 side
03:
Compressor 3 side
H02
H02
All stop
Overcurrent is
detected several
seconds after startup
of inverter
compressor.
• Check for defect in compressor.
• Check power supply voltage.
(FT9 : 208/230V ± 10%, FT6 : 460V ± 10%).
• Check compressor system wiring,
particularly for open phase.
• Check connection of connectors/
terminals on A3-IPDU P.C. board.
• Check conductivity of case heater.
(Check for refrigerant entrapment inside
compressor.)
• Check for defect in outdoor P.C. board
(A3-IPDU).
• Check outdoor MG-CTT.
Compressor
error (lockup)
MG-CTT error
IPDU
01:
Compressor 1 side
02:
Compressor 2 side
03:
Compressor 3 side
H03
H03
All stop
Current flow of at
least specified
magnitude is
detected despite
inverter compressor
having been shut
turned off.
• Check current detection circuit wiring.
• Check defect in outdoor P.C. board
(A3-IPDU).
Current detection
circuit error
I/F
H05
—
H05
All stop
Discharge
temperature of
compressor 1 (TD1)
does not increase
despite compressor
being in operation.
• Check installation of TD1, TK1, TK2,
TK3, TK4, TK5 sensor.
• Check connection of TD1, TK1, TK2,
TK3, TK4, TK5 sensor connector and
wiring.
• Check resistance characteristics of TD1
sensor.
• Check for defect in outdoor P.C. board
(I/F).
TD1 sensor
miswiring
(incomplete
insertion)
I/F
H06
—
H06
*1 Total shutdown in case of header unit
Continued operation in case of follower unit
MG-CTT: Magnet contactor
All stop
Low-pressure Ps
sensor detects
operating pressure
lower than 0.02MPa.
• Check service valves to confirm full
opening (both discharge gas side, suction
gas side and liquid sides).
• Check outdoor PMVs for clogging
(PMV1, 2).
• Check for defect in SV2 or SV4 circuits.
• Check for defect in lowpressure
Ps sensor.
• Check indoor filter for clogging.
• Check valve opening status of indoor PMV.
• Check refrigerant piping for clogging.
• Check operation of outdoor fan (during In
all heating, collective operation).
• Check for insufficiency in refrigerant
quantity.
• Check clogging in circuit at sub heat
exchanger liquid side .
(PMV4, Checked valve)
• Check 4-way valve error (Reversal error)
• Check miswiring of discharge/suction gas
main piping.
• Check Cool/Heat FS unit.
• Check mispiping of discharge/suction gas
piping to Cool/Heat FS unit.
• Check piping between Cool/Heat FS unit
and room.
• Check miswiring of SVD/SVS valve, and
mis mounting of coil.
• Check opened status of SVS valve.
• Check SV14 circuit error
Activation of
low-pressure
protection
Summary of Contents for MMY-MAP0724FT6UL
Page 35: ...35 3 5 Parts Layout in Outdoor Unit 072 type Model MMY MAP0724FT...
Page 36: ...36 096 120 type Model MMY MAP0964FT MAP1204FT...
Page 37: ...37 3 6 Parts Layout in Inverter Assembly 208 230V model MMY MAP0724FT9UL...
Page 38: ...38 208 230V model MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 39: ...39 460V model MMY MAP0724FT6UL...
Page 40: ...40 460V model MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 41: ...41 3 7 Outdoor Inverter print circuit board 3 7 1 Interface P C board MCC 1606...
Page 42: ...42 3 7 2 Inverter P C board for compressor MCC 1595 A3 IPDU For 208 230V model MMY MAP 4FT9UL...
Page 43: ...43 3 7 3 Inverter P C board for compressor MCC 1596 A3 IPDU For 460V model MMY MAP 4FT6UL...
Page 44: ...44 3 7 4 Inverter P C board for fan motor MCC 1610 FAN IPDU...
Page 45: ...45 3 7 5 Noise Filter P C board MCC 1608 A B For 208 230V model MMY MAP 4FT9UL...
Page 46: ...46 3 7 6 Noise Filter P C board MCC 1625 A B C For 460V model MMY MAP 4FT6UL...
Page 195: ...195...
Page 197: ...197...
Page 257: ...257 15 EXPLODED DIAGRAM PARTS LIST Outdoor unit 15 1 MMY MAP0724FT9UL...
Page 258: ...258 15 1 MMY MAP0724FT9UL...
Page 262: ...262 15 1 Inverter Assembly MMY MAP0724FT9UL...
Page 264: ...264 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 265: ...265 15 2 MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 269: ...269 15 2 Inverter Assembly MMY MAP0964FT9UL MMY MAP1204FT9UL...
Page 271: ...271 15 3 MMY MAP0724FT6UL...
Page 272: ...272 15 3 MMY MAP0724FT6UL...
Page 276: ...276 15 3 Inverter Assembly MMY MAP0724FT6UL...
Page 278: ...278 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 279: ...279 15 4 MMY MAP0964FT6UL MMY MAP1204FT6UL...
Page 283: ...283 15 4 Inverter Assembly MMY MAP0964FT6UL MMY MAP1204FT6UL...