Toshiba MMU-AP0057MH-E Service Manual page 73

Check code
Main Outdoor 7-segment display
remote
Check
Sub-code
controller
code
01:
TK1 sensor
problem
02:
TK2 sensor
problem
04:
TK4 sensor
problem
05:
TK5 sensor
problem
H08 H08
H15 H15 —
Location
Description
of
detection
I/F Trouble in
temperature
sensor for oil
level detection
I/F TD2 sensor
miswiring
(incomplete
insertion)
Problem 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 Discharge temperature of
(TD2) does not increase
despite compressor 2 being
in operation.
– 73 –
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 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 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).