Toshiba MCY-MUG0401HSW-E Service Manual page 167

Check code
Outdoor 7-segment display
Sub-code
F24 –
F31 –
H04 –
H06 –
L02 Detected indoor unit address
L06 Number of priority indoor units
(check code L05 or L06 depending
on individual unit)
L08 –
L10 –
L11 Detected indoor unit address
L13 Detected indoor unit address
L14 L14 Detected indoor unit address
L29
COMP. FAN
01 O
08 O
09 O O
Circle (O):
Trouble
P.C. board
00
L30 Detected indoor unit No.
P03 –
P04 1*
P05 00: Power detection trouble
01: Open phase
P07 –
Display of receiving unit
Indicator light block
Central control
or main remote
controller Operation Timer Ready
Flash
display
F24 ALT
F31
H04
H06
L04
L05
L06
(L08)
L10
L29
L29
(L30)
P03 ALT
P04 ALT
P05 ALT
P07 ALT
166
Typical problem site
High pressure sensor (Pd) Output voltage of high pressure sensor (Pd) is
trouble zero or provides abnormal readings when
compressors have been turned off.
Outdoor EEPROM trouble Outdoor EEPROM is failure (alarm and shutdown
SIM
for Outdoor unit)
Comp. case thermo The case thermo operation has been detected.
operation
Activation of low-pressure Low pressure (Ps) sensor detects abnormally low
protection operating pressure.
Indoor unit incompatible • Indoor unit incompatible with TU2C-Link is
SIM
with A2L refrigerant
• Indoor unit incompatible with R32 is connected.
Duplicated priority indoor More than one indoor unit have been set up as
SIM
unit (as displayed on priority indoor unit.
priority indoor unit)
Duplicated priority indoor More than one indoor unit have been set up as
unit (as displayed on priority indoor unit.
SIM
indoor unit other than
priority indoor unit)
Indoor group address not Address setting have not been performed for one
SIM
set or more indoor units (also detected at indoor end).
Outdoor capacity not set Outdoor unit capacity has not been set (After P.C.
SIM
board exchange)
Unsuitable safety device FS unit is connected.
SIM
connected
Mismatch of safety device • Safety measures CODE No. setting of indoor
settings
SIM
* Mixture of "pump down operation" and "Only
Safety measures • Safety measures CODE No. setting of indoor
nonconformity
SIM
• Safety measures CODE No.setting of indoor unit
Trouble in number of P.C. There are insufficient number of P.C. board in
boards inverter box.
SIM
SIM The number of P.C. board The number of inverter P.C. board is more than
trouble that of setting of outdoor interface P.C. board.
Indoor external trouble Indoor unit has been shut down for external
SIM
input (interlock) trouble input in one refrigerant line (detected by
indoor unit).
Outdoor discharge (TD) Outdoor discharge temperature sensor (TD) has
temperature trouble detected abnormally high temperature.
Activation of high-pressure High-pressure SW is activated.
SW
Power detection trouble / Open phase is detected when power is turned on.
Open phase detection /
Power supply miswiring
detection
Heat sink overheating Temperature sensor built into IPM (TH) detects
trouble overheating.
Description of Check code
connected.
unit connected to same Shut-off Valve unit is
mismatched.
"No safety measures required" does not apply.
Leak Detector" is not case.
unit is set other than "no safety measures
required" and Leak Detector is not connected at
the time of power input.
is set to "pump down operation" or "individual
shut-off operation" and Shut-off Valve unit is not
connected.