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SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
130
Troubleshooting
∗
2: Voltage measurement point
∗
1: Refer to
Thermistor Resistance / Temperature Characteristics
table on P.166.
∗
2: Refer to
Pressure Sensor, Pressure / Voltage Characteristics
table on P.168.
The s
u
ction
pipe1 temp. min
u
s
lo
w
press
u
re sat
u
ration
temp. is 36 °F
or higher.
Resistance
is normal
w
hen
meas
u
red
w
ith the
thermistor (R3T) for
s
u
ction pipe1 disconnected
from the o
u
tdoor
u
nit P.C.B.
*
1
O
u
t of gas or refrigerant
system is clogged. Re
qu
ires
check of refrigerant system.
Replace the thermistor.
Replace the o
u
tdoor
u
nit
P.C.B. (A1P).
YES
YES
N
O
N
O
O
u
t of gas, closing of stop
v
al
v
e or refrigerant system is
clogged. Re
qu
ires check of
refrigerant system.
Replace the main o
u
tdoor
u
nit P.C.B. (A1P).
Replace the lo
w
press
u
re
sensor.
YES
YES
Is the
lo
w
press
u
re sensor
correct?
Replace the lo
w
press
u
re
sensor.
N
O
N
O
Cooling
Lo
w
press
u
re
is 36psi
or less.
The
v
oltage
of X1
8
A pins (2)
and (3) on main
o
u
tdoor
u
nit P.C.B.
(A1P) is 1.0
V
DC or less.
(Lo
w
press
u
re
sensor o
u
tp
u
t
v
oltage)
*
2
N
O
N
O
YES
YES
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.
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...