Gree GVC48ALXL-M3NTC7A - Page 53

50
Installation and Maintenance
Service Manual
3.Low pressure protection of compressor (E3)
Start
Is the terminal
of low pressure switch
inserted well?
Is the
malfunction
eliminated?
Re-insert it tightly
to ensure reliable
contact.
Add refrigerant.
Is the
malfunction
Is the
higher than the acting
value of the low pressure
switch?
eliminated?
Is the
Replace the low
pressure switch.
Test when denergized:
a closed circuit between the two
terminals led out from
malfunction
eliminated?
No
Yes
No
The controller is
defined
abnormal;
replace it.
No
Yes
No
No
Yes
End
No
Ye
s
Yes
Yes
St
a
r
t
Yes