Troubleshooting
SiUS04-904
Service Diagnosis
143
4.23 Low-voltage Detection
Remote
Controller
Display
U2
Method of
Malfunction
Detection
An abnormal voltage drop is detected by checking the DC voltage detection circuit.
Malfunction
Decision
Conditions
The voltage being detected by the DC voltage detection circuit is judged to be below 150 V for
0.1 second.
The system is shut down if the error occurs 16 times.
Clearing condition: Continuous run for about 60 minutes (normal)
Supposed
Causes
Supply voltage not as specified
DC voltage detection circuit defective
PAM control part(s) defective
Short circuit inside the fan motor winding.
Troubleshooting
Correct the po
w
er s
u
pply.
Check for s
u
ch factors for
an extended period of time.
*
Try to get restarted a
co
u
ple of times.
(R02
8
5)
Caution
Be s
u
re to t
u
rn off po
w
er s
w
itch
b
efore connect or disconnect connector,
or parts damage may
b
e occ
u
rred.
N
O
YES
YES
N
O
YES
(Preca
u
tion
b
efore t
u
rning on the po
w
er again)
N
O
Replace fan motor and
o
u
tdoor
u
nit PCB.
Replace the o
u
tdoor
u
nit
PCB.
Check the s
u
pply
v
oltage.
Rotate fan
b
y hand.
Dist
u
r
b
ance factors
*
N
oise
*
Po
w
er s
u
pply distortion
Repeat a
Make s
u
re the po
w
er has
b
een off for
T
u
rn on the
po
w
er again. System
restarted?
Does fan rotate
smoothly?
S
u
pply
v
oltage
as specified?
Summary of Contents for FTXS09HVJU
Page 1: ...SiUS04 904 Applied Models Inverter Pair Heat Pump Inverter Pair Wall Mounted Type H Series...
Page 9: ...Safety Considerations SiUS04 904 viii Safety Considerations...
Page 10: ...SiUS04 904 List of Functions 1 Part 1 List of Functions 1 Functions 2...
Page 72: ...Control Specification 15 18 24 Class SiUS04 904 62 Function and Control...
Page 77: ...FTXS09 12HVJU SiUS04 904 66 Operation Manual...
Page 78: ...SiUS04 904 FTXS09 12HVJU Operation Manual 67...
Page 83: ...FTXS09 12HVJU SiUS04 904 72 Operation Manual is no longer displayed on the LCD...
Page 84: ...SiUS04 904 FTXS09 12HVJU Operation Manual 73 is no longer displayed on the LCD...
Page 85: ...FTXS09 12HVJU SiUS04 904 74 Operation Manual...
Page 86: ...SiUS04 904 FTXS09 12HVJU Operation Manual 75...
Page 87: ...FTXS09 12HVJU SiUS04 904 76 Operation Manual 3P232717 1C...
Page 90: ...SiUS04 904 FTXS15 18 24HVJU Operation Manual 79 is no longer displayed on the LCD...
Page 91: ...FTXS15 18 24HVJU SiUS04 904 80 Operation Manual...
Page 94: ...SiUS04 904 FTXS15 18 24HVJU Operation Manual 83 is no longer displayed on the LCD...
Page 95: ...FTXS15 18 24HVJU SiUS04 904 84 Operation Manual Do not hit or forcefully push the operation...
Page 96: ...SiUS04 904 FTXS15 18 24HVJU Operation Manual 85 is no longer displayed on the LCD...
Page 97: ...FTXS15 18 24HVJU SiUS04 904 86 Operation Manual is no longer displayed on the LCD...
Page 98: ...SiUS04 904 FTXS15 18 24HVJU Operation Manual 87 is no longer displayed on the LCD...
Page 99: ...FTXS15 18 24HVJU SiUS04 904 88 Operation Manual...
Page 100: ...SiUS04 904 FTXS15 18 24HVJU Operation Manual 89...
Page 101: ...FTXS15 18 24HVJU SiUS04 904 90 Operation Manual 3P232717 2C...