Toshiba MMY-MAP0726FT2P-UL - Page 155

Check code
Location
of
detection
Description
System
status
Check code detection
condition(s)
Main
Check items (locations)
remote
Outdoor 7-segment display
controller
Check
code
Sub-code
Oil level
detection
circuit trouble
All stop
01: TK1 oil circuit trouble
02: TK2 oil circuit trouble
04: TK4 oil circuit trouble
05: TK5 oil circuit trouble
•
•
No temperature
change is detected
by TK1 despite
compressor 1
having been started.
•
•
•
Check for disconnection of TK1 sensor.
Check resistance characteristics of
TK1 sensor.
Check for connection trouble involving
TK1, TK2, TK4, and TK5 sensors
Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
Check for refrigerant entrapment inside
compressor.
•
•
No temperature
change is detected
by TK2 despite
compressor 2
having been started.
•
•
•
Check for disconnection of TK2 sensor.
Check resistance characteristics of
TK2 sensor.
Check for connection trouble involving
TK1, TK2, TK4, and TK5 sensors
Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
Check for refrigerant entrapment inside
compressor.
I/F
No temperature
change is detected
by TK4 despite
compressor having
•
been started.
•
•
•
•
Check for disconnection of TK4 sensor.
Check resistance characteristics of TK4
sensor.
Check for connection trouble involving
TK1, TK2, TK4, and TK5 sensors
Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
Check for refrigerant entrapment inside
compressor.
No temperature
change is detected
by TK5 despite
compressor having
•
been started.
•
•
•
•
H16
Check for disconnection of TK5 sensor.
Check resistance characteristics of
TK5 sensor.
Check for connection trouble involving
TK1, TK2, TK4, and TK5 sensors
Check for clogging in oil equalizing
circuit capillary and faulty operation in
check valve.
Check for refrigerant entrapment inside
compressor.
H16
− 154 −
J03
Indoor
unit
Duplication of
FS units
Stop of
corresponding
unit(s)
More than one FS units
have been set up in one
refrigirant line.
・Check indoor unit(s)-FS unit(s) cable
J10
J10
Indoor
unit
FS unit overflow
trouble
All stop
・Float switch operates
・Float switch circuit is
open-circuited or
disconnected
at connector.
・Check float switch connector
・Check operation of drain pump.
・Check drain pump circuit
・Check drain pipe for clogging
・Check for defect indoor PC board.
J11
Indoor
unit
FS unit
Temperature
sensor(TCS)
trouble
Stop of
corresponding
unit(s)
Sensor resistance is
infinity or zero(open/
short circuit)
・Check connection of TCS sensor
connector
・Check resistance characteristics of
TCS sensor.
・Check for defect FS unit PC board.
–
Detected indoor address
––
–
L03 – –
Indoo
r
un
it
Dup
licated
in
door
he
ader
un
i
t
St
op
of
cor
responding
unit
There are more than
one header units in
group.
• Check indoor addresses.
• Check for any change
made to remote controller
connection (group/
individual) since indoor
address setting.
L04 L04 –
I/F Duplicated
outdoor line
address
All stop
There is duplication in
line address setting for
outdoor units belonging
to different refrigerant
piping systems.
• Check line addresses.
L02 L02
–
Indoor
unit
Outdoor units
model
disagreement
trouble
All Stop
In case of different
outdoor unit
• Check outdoor unit model.