Toshiba MCY-MHP0305HT-C Service Manual page 100

Check code
Location
Outdoor 7-segment display
Main
remote detection
Check
Sub-code
controller
code
IPDU
H03 H03 –
I/F
H04 H04 –
I/F
H06 H06 –
Indoor
unit
L03 – –
I/F
L04 L04 –
I/F
L05 – –
No. of priority I/F
indoor units
L06 L06
of Description System status
Current All stop
detection circuit
error
Compressor All stop
case thermo
operation
Activation of All stop
low-pressure
protection
Duplicated Stop of
indoor outdoor corresponding
unit unit
Duplicated All stop
outdoor line
address
Duplicated All stop
priority indoor
unit (as
displayed on
priority indoor
unit)
Duplicated All stop
priority indoor
unit (as
displayed on
indoor unit other
than priority
indoor unit)
99
122
Error detection
Check items (locations)
condition(s)
Current flow of at least Check current detection
specified magnitude is circuit wiring.
detected despite inverter Check defect in outdoor
compressor having been shut P.C. board (IPDU).
turned off.
Compressor case thermostat Check compressor case
performed protective thermo circuit.
operation. (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 error.
Check refrigerant amount
shortage.
Low-pressure Ps sensor Check service valves to
detects operating pressure confirm full opening
lower than 0.02 MPa. (both gas and liquid sides).
Check outdoor PMV for
clogging.
Check for defect 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.
There is more than one Check indoor addresses.
outdoor unit in group. Check for any change
made to remote controller
connection (group /
individual) since indoor
address setting.
There is duplication in line Check line addresses.
address setting for outdoor
units belonging to different
refrigerant piping systems.
More than one indoor unit Check display on priority
has been set up as priority indoor unit.
indoor unit.
More than one indoor unit Check displays on priority
have been set up as priority indoor unit and outdoor
indoor unit. unit.