Toshiba MCY-MHP0506HT-C Service Manual page 105

Check code
Outdoor 7-segment display
Main
remote
Check
Sub-code
controller
code
H03 H03 –
H04 H04 –
H06 H06 –
L03 – –
L04 L04 –
L05 – –
No. of priority
indoor units
L06 L06
Location
of Description System status
detection
IPDU Current All stop
detection circuit
trouble
I/F Compressor
All stop
case thermostat
operation
I/F Activation of All stop
low-pressure
protection
Indoor Duplicated Stop of
unit indoor outdoor corresponding
unit unit
I/F Duplicated All stop
outdoor line
address
I/F Duplicated All stop
priority indoor
unit (as
displayed on
priority indoor
unit)
I/F Duplicated All stop
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
Check code detection
condition(s)
Current flow of at least
specified magnitude is
detected despite inverter
compressor having been shut
turned off.
Compressor case thermostat
performed protective
operation.
Low-pressure PS sensor
detects operating pressure
lower than 0.02 MPa.
There is more than one
outdoor unit in group.
There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems.
More than one indoor unit
has been set up as priority
indoor unit.
More than one indoor unit
have been set up as priority
indoor unit.
104
122
Check items (locations)
• Check current detection
circuit wiring.
• Check trouble in outdoor
P.C. board (IPDU).
• Check compressor case
thermostat circuit.
(Connector, wiring, P.C.
board)
• Check full opening of
service valve.
(Gas and liquid side)
• Check outdoor PMV
clogging.
• Check SV4 circuit leakage.
• Check miswiring /
misinstallation of SV4.
• Check valve open status of
indoor PMV.
• Check 4-way valve trouble.
• Check refrigerant amount
shortage.
• Check service valves to
confirm full opening
(both gas and liquid sides).
• Check outdoor PMV for
clogging.
• Check for trouble in SV2 or
SV4 circuits.
• Check for defect in low-
pressure 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 heating).
• Check for insufficiency in
refrigerant quantity.
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.
• Check line addresses.
• Check display on priority
indoor unit.
• Check displays on priority
indoor unit and outdoor
unit.