Troubleshooting for MSP Duct Type Indoor Unit
SiSG121917E
137
Part 6 Service Diagnosis
6.10 Field Setting Abnormality
Error Code
UA
Error Decision
Conditions
Incorrect field setting
Supposed
Causes
Defective indoor unit PCB
Defective outdoor unit PCB
Improper power supply
Indoor-outdoor, indoor-indoor unit transmission wiring
Defective remote controller wiring
Troubleshooting
Connect the
w
irings correctly.
Replace the indoor
u
nit PCB
(control PCB).
N
ormal
Connect the
w
irings correctly.
Check the po
w
er s
u
pply system
inside the indoor
u
nit.
Co
u
ld
b
e incorrect
w
iring.
Check again.
YES
YES
N
O
N
O
Connect the remote controller
correctly.
YES
YES
N
O
YES
Remo
v
e the j
u
mper.
N
O
YES
Set the field setting correctly.
YES
N
O
N
O
N
O
Blink
(R22125)
Is the remote
controller connected to
one or more indoor
u
nits?
Is the remote
controller
w
iring j
u
mped
b
et
w
een indoor
u
nits?
Is the field
setting correct?
Do the ser
v
ice
monitors of all the
indoor
u
nits
b
link?
Are the
w
irings
b
et
w
een indoor
u
nit and
o
u
tdoor
u
nit correctly
connected?
Is 220
~
240
VAC
b
et
w
een
N
o.1
and 3 of the terminal
b
oard for transmission
(indoor
u
nit)?
Does the system cond
u
ct
normal operation?
Are the
w
irings
b
et
w
een indoor
u
nit and
o
u
tdoor
u
nit correctly
connected?
T
u
rn off the po
w
er. Then, t
u
rn
on the po
w
er to restart the
system.
Contin
u
o
u
sly
O
N
or OFF
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
