Sinclair Alpha Inverter Series Manual page 46

Service Manual
Display Method of Indoor Unit
Dual-8
Malfunction
NO.
Code
Name
Display
Normal
53 communica-
tion
54 Defrosting
Zero-crossing
inspection
55
circuit malfun-
U8
ction of the
IDU fan motor
Installation and Maintenance
Display Method of Outdoor Unit
Indicator Display (during Indicator has 3 kinds of display
blinking, ON 0.5s and OFF status and during blinking, ON
0.5s) 0.5s and OFF 0.5s
Operation Cool Heating
Indicator Indicator Indicator Indicator
OFF 3S
and blink
once
OFF 3S
(during
and blink
blinking,
ON 10s
and OFF
0.5s)
Flash 17
times
every 3s
Yellow Red Green
Indicator Indicator
continously
Defrosting will occur in
heating
mode. Compressor will
operate
twice
while indoor fan will stop
operation.
1. Discharging speed of
Operation
capacitor is slow, which lead
of remote
to wrong judgement of
controller or
controller.
control
panel is
Zero-crossing detection
available,
circuit of main board is
but the unit
abnormal
won't act.
A/C status Possible Causes
Its the normal state
Refer to maintenance flowchart
43