Toshiba MMW-AP0271LQ-E Service Manual page 52

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
01: TK1 sensor
error
02: TK2 sensor
error
03: TK3 sensor
error
04: TK4 sensor
error
05: TK5 sensor
error
H08 H08
H14 H14 —
H15 H15 —
Location
Description
of
detection
I/F Error in
temperature
sensor for oil
level detection
I/F Compressor 2
case thermo
activation
I/F TD2 sensor
miswiring
(incomplete
insertion)
Error detection
System status
condition(s)
All stop Sensor resistance is infinity
or zero (open / short circuit).
All stop Sensor resistance is infinity
or zero (open / short circuit).
All stop Sensor resistance is infinity
or zero (open / short circuit).
All stop Sensor resistance is infinity
or zero (open / short circuit).
All stop Sensor resistance is infinity
or zero (open / short circuit).
All stop Compressor 2 case thermo
was activated.
All stop Air discharge temperature of
(TD2) does not increase
despite compressor 2 being
in operation.
– 52 –
Indoor unit (including Hot Water Module)
Check items (locations)
• Check connection of TK1
sensor connector.
• Check resistance
characteristics of TK1
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TK2
sensor connector.
• Check resistance
characteristics of TK2
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TK3
sensor connector.
• Check resistance
characteristics of TK3
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TK4
sensor connector.
• Check resistance
characteristics of TK4
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check connection of TK5
sensor connector.
• Check resistance
characteristics of TK5
sensor.
• Check for defect in outdoor
P.C. board (I/F).
• Check Compressor 2 case
thermo circuit.
(Connector, Wiring, Circuit
board)
• Open and check the
service valve.
(Gas side, Liquid side)
• Check the outdoor PMV
clogging
(PMV1, 2).
• Check the SV42 circuit.
• Check the SV4 circuit
(SV41 / 42 miswiring).
• Check the opening status
of indoor PMV.
• Check the four-way valve
error.
• Check the refrigerant
shortage.
• Check installation of TD2
sensor.
• Check connection of TD2
sensor connector and
wiring.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in outdoor
P.C. board (I/F).