Troubleshooting for Outdoor Unit
SiENBE18-621
322
Troubleshooting
7.13 Malfunction of Thermistor (R7T) for Outdoor Unit Liquid
Pipe
Remote Control
Display
J7
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the liquid pipe thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed
Causes
"
Defect of thermistor (R7T) for outdoor unit liquid pipe
"
Defect of outdoor unit PCB (A1P)
Troubleshooting
∗
Refer to thermistor resistance / temperature characteristics table on P355.
(V
3
074)
Caution
Be
su
re to t
u
rn off power
s
witch
b
efore connect or di
s
connect connector,
or p
a
rt
s
d
a
m
a
ge m
a
y
b
e occ
u
rred.
Re
s
i
s
t
a
nce
i
s
norm
a
l when
me
asu
red
a
fter
di
s
connecting the thermi
s
tor
(R7T) from the o
u
tdoor
u
nit PC
b
o
a
rd.
(
3
.5kW
~
3
60kW)
Repl
a
ce o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
Connect the thermi
s
tor
a
nd t
u
rn
on
a
g
a
in.
NO
NO
Repl
a
ce the thermi
s
tor (R7T).
YE
S
YE
S
Connector
i
s
connected to o
u
tdoor
u
nit PC
b
o
a
rd
(A1P).
Summary of Contents for BPMKS967B2B
Page 1: ...SiENBE18 621 E Series Service Manual Applied Models Super Multi Plus Heat Pump...
Page 12: ...SiENBE18 621 List of Functions 1 Part 1 List of Functions 1 List of Functions 2...
Page 19: ...List of Functions SiENBE18 621 8 List of Functions...
Page 33: ...Specifications SiENBE18 621 22 Specifications...
Page 69: ...Refrigerant Flow for Each Operation Mode SiENBE18 621 58 Refrigerant Circuit...
Page 121: ...Indoor Unit SkyAir Models SiENBE18 621 110 Function...
Page 169: ...Instruction SiENBE18 621 158 System Configuration FTXS 20 25 35C Indoor Unit...
Page 371: ...Method of Replacing The Inverter s Power Transistors Modules SiENBE18 621 360 Troubleshooting...
Page 393: ...SiENBE18 621 vi Index...