Toshiba MMY-MAP0806HT8(J)P Service Manual page 181

Check code
Outdoor 7-segment display
Main
remote
Check
controller
code
01: Compressor 1 side
02: Compressor 2 side
P04 P04
00:
01: Compressor 1 side
02: Compressor 2 side
P05 P05
01: Compressor 1 side
02: Compressor 2 side
P07 P07
Detected indoor address
P10 P10
P12 –
AMP Air Conditioning
Location
of
detection
Sub-code
IPDU Activation of high-
pressure SW
I/F Detection of open
phase/phase sequence
Inverter DC voltage
(Vdc) error
(compressor)
MG-CTT error
IPDU Heat sink overheating
I/F error
Indoor Indoor overflow error
unit
Indoor Indoor fan motor error
unit
–
System
Description
status
All stop High-pressure SW is
activated.
All stop • Open phase is
• Inverter DC
All stop Temperature sensor
built into IPM (TH) is
overheated.
All stop • Float switch
• Float switch circuit
Stop of • Motor speed
corresponding
unit
• Overcurrent
− 180 −
Error detection
Check items (locations)
condition(s)
• Check connection of high-
pressure SW connector.
• Check for defect in Pd
pressure sensor.
• Check outdoor service valves
(gas side, liquid side) to
confirm full opening.
• Check for defect in outdoor
fan.
• Check for defect in outdoor
fan motor.
• Check outdoor PMVs (PMV1,
3) for clogging.
• Check indoor/outdoor heat
exchangers for clogging.
• Check for short-circuiting of
outdoor suction/discharge air
flows.
• Check SV2 circuit for
clogging.
• Check for defect in outdoor
P.C. board (I/F).
• Check for error in indoor fan
system (possible cause of air
flow reduction).
• Check opening status of
indoor PMV.
• Check indoor-outdoor
communication line for wiring
error.
• Check for faulty operation of
check valve in discharge pipe
convergent section.
• Check gas balancing SV4
valve circuit.
• Check SV5 valve circuit.
• Check for refrigerant
overcharging.
• Check for defect in outdoor
detected when P.C. board (I/F).
• Check wiring of outdoor
power is turned
power supply.
on.
voltage is too high
(overvoltage) or
too low
(undervoltage).
• Check power supply voltage.
• Check outdoor fan system
error.
• Check heat sink cooling duct
for clogging.
• Check IPM and heat sink for
thermal performance for faulty
installation.
(e.g. mounting screws and
thermal conductivity)
• Check for defect in A3-IPDU.
(faulty IPM built-in
temperature sensor (TH))
• Check float switch connector.
operates. • Check operation of drain
pump.
is open-circuited • Check drain pump circuit.
or disconnected at • Check drain pipe for clogging.
connector. • Check for defect in indoor
P.C. board.
• Check connection of fan
measurements connector and wiring.
continuously • Check for defect in fan motor.
deviate from target • Check for defect in indoor
value. P.C. board.
• Check impact of outside air
protection is treatment (OA).
activated.
MG-CTT: Magnet contactor
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