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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
140
3.42 “
UF
” System is not Set yet
Remote
Controller
Display
UF
Applicable
Models
All models of indoor units
RZQ18~30PVJU
Method of
Malfunction
Detection
On check operation, the number of indoor units in terms of transmission is not corresponding to
that of indoor units that have made changes in temperature.
Malfunction
Decision
Conditions
The malfunction is determined as soon as the abnormality aforementioned is detected through
checking the system for any erroneous connection of units on the check operation.
Supposed
Causes
Improper connection of transmission wiring between indoor-outdoor units and
outdoor-outdoor units
Failure to execute check operation
Defect of indoor unit P.C.B.
Stop valve is left in closed
Troubleshooting
Note:
Wiring check operation may not be successful if carried out after the outdoor unit has been off
for more than 12 hours, or if it is not carried out after running all connected indoor units in the
fan mode for at least an hour.
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector, or parts co
u
ld
b
e damaged.
Is
indoor - o
u
tdoor
and o
u
tdoor - o
u
tdoor
u
nit
transmission
w
iring
normal?
Replace indoor
u
nit P.C.B.
W
iring check operation may
not ha
v
e
b
een carried o
u
t
s
u
ccessf
u
lly.
After fixing incorrect
w
iring,
p
u
sh and hold the RESET
bu
tton on the master o
u
tdoor
u
nit P.C.B. for 5 seconds.
*
The
u
nit
w
ill not r
u
n for
u
p to
12 min
u
tes.
YES
N
O
YES
N
O
N
O
YES
Is the
check operation
carried o
u
t?
Is indoor
-o
u
tdoor and o
u
tdoor-o
u
tdoor
u
nit transmission
w
iring normal?
Open the stop
v
al
v
e.
YES
N
O
Are the stop
v
al
v
es opened?
Summary of Contents for SkyAir FCQ18PVJU
Page 1: ...Split System Air Conditioners SkyAir Inverter R 410A Heat Pump 60Hz P Series SiUS28 902_a...
Page 44: ...Other Control SiUS28 902_a 37 Function...
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