Toshiba MMW-UP0271LQ-E - Page 61

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Check code
Location
of
detection
Description System status
Check code detection
condition(s)
Check items (locations)
• Check outdoor unit model.
(Check whether the
outdoor unit corresponds
to Air to Air Heat
Exchanger type or not.)
Outdoor units
model
disagreement
trouble
Indoor unit Stop of
corresponding
unit
In case of different outdoor
unit (Not corresponded to
Air to Air Heat Exchanger
type)
L02 L02 —
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
Duplicated
indoor header
unit
Indoor unit Stop of
corresponding
unit
There are more than one
header units in group.
L03 — —
• Check power supply
voltage. (AC380V ± 10%).
• Check for failure in
compressor.
• Check for possible cause
of abnormal overloading.
• Check for failure in outdoor
P.C. board (compressor).
Compressor
trouble
(out of sync)
Compressor
P.C. board
1∗: Compressor
1 side
2∗: Compressor
2 side
All stop Judged that the
synchronization could not be
taken.
H17 H17
• Check line addresses.Duplicated
outdoor line
address
I/F All stop There is duplication in line
address setting for outdoor
units belonging to different
refrigerant piping systems.
L04 L04 —
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check for disconnection of
TK1 sensor.
• Check resistance
characteristics of TK1
sensor.
• Check for connection
trouble involving TK1 and
TK2 sensors
• Check for clogging in oil
equalizing circuit capillary.
• Check for refrigerant
entrapment inside
compressor.
Oil level
detection
circuit trouble
I/F01: TK1 oil
circuit trouble
02: TK2 oil
circuit trouble
All stop No temperature change is
detected by TK1 despite
compressor 1 having been
started.
H16 H16
• Check for disconnection of
TK2 sensor.
• Check resistance
characteristics of TK2
sensor.
• Check for connection
trouble involving TK1 and
TK2 sensors
• Check SV3F valve
malfunction.
• Check for clogging in oil
equalizing circuit capillary.
• Check for refrigerant
entrapment inside
compressor.
No temperature change is
detected by TK2 despite
compressor 2 having been
started.
• Check connection of TK1
sensor connector.
• Check resistance
characteristics of TK1
sensor.
• Check for failure in outdoor
P.C. board (I/F).
Trouble in
temperature
sensor for oil
level detection
I/F01: TK1 sensor
trouble
02: TK2 sensor
trouble
All stop Sensor resistance is infinity
or zero (open/short circuit).
H08 H08
• Check installation of TD2
sensor.
• Check connection of TD2
sensor connector and
wiring.
• Check resistance
characteristics of TD2
sensor.
• Check for failure in outdoor
P.C. board (I/F).
TD2 sensor
miswiring
(incomplete
insertion)
I/F All stop Discharge temperature of
(TD2) does not increase
despite compressor 2 being
in operation.
H15 H15 —
• Check connection of TK2
sensor connector.
• Check resistance
characteristics of TK2
sensor.
• Check for failure in outdoor
P.C. board (I/F).
All stop Sensor resistance is infinity
or zero (open/short circuit).
Indoor unit (including Hot Water Module)