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Troubleshooting by Indication on the Remote Controller
SiUS28-902_a
105
Troubleshooting
N
O
YES
N
O
YES
N
O
YES
CHECK 2
Is the stop
v
al
v
e open?
Open the stop
v
al
v
e.
Mo
u
nt a press
u
re ga
u
ge on the lo
w
-press
u
re ser
v
ice port.
Connect the Ser
v
ice Checker.
Reset the operation
u
sing the remote controller, and then
restart the operation.
Are the
characteristics of the
lo
w
press
u
re sensor
normal?
(See *1.)
Replace the lo
w
press
u
re sensor.
Is the
press
u
re detected
w
ith the P.C.B.
normal?
(See *2.)
Replace the main P.C.B..
· The lo
w
press
u
re sensor is normal, and the press
u
re
detected
w
ith the P.C.B. is also normal.
· The lo
w
press
u
re has really
b
ecome lo
w
.
Remo
v
e the ca
u
ses
b
y
w
hich the lo
w
press
u
re has
b
ecome lo
w
.
*1: Make a comparison
b
et
w
een the
v
oltage of the press
u
re sensor and that read
b
y the
press
u
re ga
u
ge.
(As to the
v
oltage of the press
u
re sensor, make meas
u
rement of
v
oltage at the connector,
and then con
v
ert it to press
u
re according to information on P.16
8
.)
*2: Make a comparison
b
et
w
een the lo
w
press
u
re
v
al
u
e checked
w
ith the Ser
v
ice Checker
and the
v
oltage of the press
u
re sensor (see *1).
*3:Take meas
u
rement of
v
oltage of the press
u
re sensor.
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.
(Refer to P.157)
+5
V
(4)
(3)
(2)
(1)
Connector for lo
w
press
u
re sensor
Micro controller
A/D inp
u
t
Take meas
u
rement of DC
v
oltage
b
et
w
een these
w
ires.
(Bl
u
e)
Red
Black
W
hite
Lo
w
press
u
re
sensor
Troubleshooting
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...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
Page 185: ...SiUS28 902 Precautions for New Refrigerant R 410A Precautions for New Refrigerant R 410A 178...