Tosot TW09HQ3D6D Service Manual page 42

Service Manual
Malfunction
NO.
Name
Normal
53 communica-
tion
54 Defrosting
55
Malfunction
56
of detecting
plate(WIFI )
Installation and Maintenance
Display Method of Indoor Unit
Indicator Display (during
blinking, ON 0.5s and OFF
Dual-8
0.5s)
Code
Operation
Display
Indicator
OFF 3S
and blink
once
(during
blinking,
ON 10s
and OFF
0.5s)
U8
JF
A/C status
Cool Heating
Indicator Indicator
Defrosting will occur in
heating
mode. Compressor will
operate
while indoor fan will stop
operation.
The complete unit stops
Possible Causes
Its the normal state
1.Power supply is abnormal;
2.Detection circuit of indoor
control mainboard is abnormal.
39