Toshiba MMC-AP0157HP1-E Service Manual page 73

Check code
Outdoor 7-segment display
Main
remote
Check
controller Sub-code
code
H07 H07
01: TK1 sensor
error
02: TK2 sensor
error
03: TK3 sensor
error
04: TK4 sensor
error
05: TK5 sensor
error
H08 H08
Location
Description System status
of
detection
I/F Low oil level All stop
protection
I/F Error in All stop
temperature
sensor for oil
level detection
All stop
All stop
All stop
All stop
– 73 –
FILE NO. SVM-16042
Error detection
Check items (locations)
condition(s)
Operating compressor <All outdoor units in
detects continuous state of corresponding line to be
low oil level for about 2 hours. checked>
Check balance pipe
service valve to confirm full
opening.
Check connection and
installation of TK1, TK2,
TK3, TK4, and TK5
sensors.
Check resistance
characteristics of TK1,
TK2, TK3, TK4, and TK5
sensors.
Check for gas or oil leak in
same line.
Check for refrigerant
entrapment inside
compressor casing.
Check SV3A, SV3B,
SV3C, SV3D, SV3E, and
SV3F valves for defect.
Check oil return circuit of
oil separator for clogging.
Check oil equalizing circuit
for clogging.
Sensor resistance is infinity Check connection of TK1
or zero (open / short circuit). sensor connector.
Check resistance
characteristics of TK1
sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TK2
or zero (open / short circuit). sensor connector.
Check resistance
characteristics of TK2
sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TK3
or zero (open / short circuit). sensor connector.
Check resistance
characteristics of TK3
sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TK4
or zero (open / short circuit). sensor connector.
Check resistance
characteristics of TK4
sensor.
Check for defect in outdoor
P.C. board (I/F).
Sensor resistance is infinity Check connection of TK5
or zero (open / short circuit). sensor connector.
Check resistance
characteristics of TK5
sensor.
Check for defect in outdoor
P.C. board (I/F).