Sinclair AST-24BI Service Manual page 45

Service Manual
4. High discharge temperature protection of compressor (E4)
Abnormal system (blockage)
value of discharge temperature sensor
Installation and Maintenance
Start
no
Motor speed of
outdoor unit is abnoral
(under cooling mode)
no
Abnormal air in for
outdoor unit (under cooling
mode)
no
Normal syste, but resistance
for compressor is abnormal
no
Replace control
panel
End
Check the system;
eliminate the
yes
blockage
no
Check wiring and
fan capacitor,
yes
replace motor
no
Check the unit to
let the air come in
yes
and come out
smoothly
no
Replace tempera-
yes
ture sensor
no
Problem is
yes
solved
Problem is
yes
solved
Problem is
yes
solved
Problem is
yes
solved
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