– 53 –
Check code
Location
of
detection
Description
System status
Error detection
condition(s)
Check items (locations)
• Check for disconnection of
TK4 sensor.
• Check resistance
characteristics of TK4 sensor.
• Check for connection error
involving TK1, TK2, TK3, TK4,
and TK5 sensors.
• Check for faulty operation in
SV3E or SV3F valve.
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant
entrapment inside compressor.
No temperature change is
detected by TK4 despite
compressor having been
started.
• Check for disconnection of
TK5 sensor.
• Check resistance
characteristics of TK5 sensor.
• Check for connection error
involving TK1, TK2, TK3, TK4,
and TK5 sensors.
• Check for faulty operation in
SV3E valve.
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant
entrapment inside compressor.
No temperature change is
detected by TK5 despite
compressor having been
started.
Main
remote
controller
Outdoor 7-segment display
Check
code
Sub-code
• Check for disconnection of TK1
sensor.
• Check resistance
characteristics of TK1 sensor.
• Check for connection error
involving TK1, TK2, TK3, TK4,
and TK5 sensors.
• Check for faulty operation in
SV3E or SV3F valve.
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant
entrapment inside compressor.
I/F
SMMS-i
(4 series)
01: TK1 oil
circuit error
02: TK2 oil
circuit error
03: TK3 oil
circuit error
04: TK4 oil
circuit error
05: TK5 oil
circuit error
Oil level
detection
circuit error
All stop
No temperature change is
detected by TK1 despite
compressor 1 having been
started.
• Check for disconnection of
TK2 sensor.
• Check resistance
characteristics of TK2 sensor.
• Check for connection error
involving TK1, TK2, TK3, TK4,
and TK5 sensors.
• Check for faulty operation in
SV3E or SV3F valve.
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant
entrapment inside compressor.
No temperature change is
detected by TK2 despite
compressor 2 having been
started.
• Check for disconnection of
TK3 sensor.
• Check resistance
characteristics of TK3 sensor.
• Check for connection error
involving TK1, TK2, TK3, TK4,
and TK5 sensors.
• Check for faulty operation in
SV3E or SV3F valve.
• Check for clogging in oil
equalizing circuit capillary and
faulty operation in check valve.
• Check for refrigerant
entrapment inside compressor.
No temperature change is
detected by TK3 despite
compressor 3 having been
started.
H16
H16
Indoor unit (including Hot Water Module)