Pipe Blockage Error (Error Code : E422) - Samsung AC009BNLDCH Service Manual

Troubleshooting

4-4-13. Pipe blockage error (Error Code : E422)

Outdoor Unit display
Wired remote Control, Wind Free RAC
Duct, 1way Cassette
Display
Duct
Blue Red
1way
Blue Yellow
◑
X
Judgment
Refer to checking method, as shown below.
method
Symtom
If there occurs E422 error, reset the power
and check in the following order.
Is outdoor unit service valve opened?
Is connection of piping suitable?
(Check the disconnection, bent, or cross-
connection with other sets.)
Does operation error of
refrigerant leakage or EEV appear?
Is it defect of indoor machine EVA
sensor and connection state?
4-70
E422
E422
4way Cassette,
4way Cassette(600x600)
or
or
or
◑ ◑ ◑
X X
Yes
Yes
Yes
MAX4
◑ ◑ ◑ ◑
●
No Check whether the pipe is empty and open all
the service valves on the gas and liquid pipes..
No
Modify the piping and connect immediately
and then empty the pipes and open the service valves.
No
Check the replacement of the EEV (body/coil)
and the refrigerant leaking part. After that, recharge.
No
Check the temperature value through S-NET, etc.
and then if there is a fault, replace and reconnect.
Console
◑ ◑ ◑
X X
Samsung Electronics
360 Cassette
BLUE ◑