Toshiba MMD-AP0724H2UL Service Manual page 62

Check code
Outdoor 7-segment display
Main
remote
controller Check code Sub-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
H15 H15 –
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Location
of Description System status
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
I/F TD2 sensor All stop
miswiring
(incomplete
insertion)
– 62 –
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).
Air discharge temperature of • Check installation of TD2
(TD2) does not increase sensor.
despite compressor 2 being • Check connection of TD2
in operation. sensor connector and
wiring.
• Check resistance
characteristics of TD2
sensor.
• Check for defect in outdoor
P.C. board (I/F).