Sinclair SCV-50EA - Page 79

P1 malfunction: High pressure protection
LED dis
p
la
y
s P1
High pressure protection
Judge whether the wiring connection is correct.
Judge wire body is broken or not.
YES
NO
Connect again.
To confirm: short-circuit high pressure switch and check whether
the system can operate normally or not.
NO
Replace high pressure switch.
YES
Check whether the coolin
g
s
y
stem is normal or not.
Re
p
lace main PCB.
NO
Check whether pressure of the system is too high.
YES
Stop the system.
NO
Wh
et
h
e
r
s
i
de
a
ir
duct
o
f
outdoo
r
u
ni
t
m
eets
t
h
e
sta
n
da
r
d
.
NO
Rectify the air duct
YES
Whether the heat exchanger needs cleaning.
YES
Clean.
NO
Whether the
p
i
p
eline is blocked.
YES
Rectify the pipeline.
Judge the circulation water pump is damaged or not.
Repair or replace the water pump
YES
Whether plate heat exchanger is fouling or blocked severely
Clean or replace heat exchanger .
YES
NO
NO
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