Toshiba MMY-MAP0724HT6UL - Page 124

123
Check code
Location
of
detection
Description System status Error detection condition(s) Check items (locations)
Wired
remote
control
Outdoor 7-segment display
Check
code
Sub-code
H06 H06 –
I/F Activation of
low-pressure
protection
All stop Low-pressure Ps sensor detects
operating pressure lower than
0.02MPa.
• Check service valves to confirm
full opening
(both gas and liquid sides).
• Check outdoor PMVs for clogging
(PMV1, 2).
• Check for defect in SV2 or SV4
circuits.
• Check for defect in low-pressure
Ps sensor.
• Check indoor filter for clogging.
• Check valve opening status of
indoor PMV.
• Check refrigerant piping for
clogging.
• Check operation of outdoor fan
(during heating).
• Check for insufficiency in
refrigerant quantity.
H07 H07
0
∗: I/F Low oil level
protection
All stop Operating compressor detects
continuous state of low oil level for
about 2 hours.
<All outdoor units in corresponding
line to be 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.
H08 H08
01: TK1 sensor
error
02: TK2 sensor
error
03: TK3 sensor
error
04: TK4 sensor
error
05: TK5 sensor
error
I/F Error in
temperature
sensor for oil
level detection
All stop Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TK1 sensor
connector.
• Check resistance characteristics
of TK1 sensor.
• Check for defect in outdoor P.C.
board (I/F).
All stop Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TK2 sensor
connector.
• Check resistance characteristics
of TK2 sensor.
• Check for defect in outdoor P.C.
board (I/F).
All stop Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TK3 sensor
connector.
• Check resistance characteristics
of TK3 sensor.
• Check for defect in outdoor P.C.
board (I/F).
All stop Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TK4 sensor
connector.
• Check resistance characteristics
of TK4 sensor.
• Check for defect in outdoor P.C.
board (I/F).
All stop Sensor resistance is infinity or zero
(open/short circuit).
• Check connection of TK5 sensor
connector.
• Check resistance characteristics
of TK5 sensor.
• Check for defect in outdoor P.C.
board (I/F).
H15 H15 –
I/F TD2 sensor
miswiring
(incomplete
insertion)
All stop Air discharge temperature of (TD2)
does not increase despite
compressor 2 being in operation.
• 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).