Troubleshooting
SiE12-411
188
Service Diagnosis
5.16 Discharge Pipe Temperature Control
Remote
Controller
Display
F3
Outdoor Unit LED
Display
A
5
1
4
2
1
3
4
4
1
Method of
Malfunction
Detection
The discharge pipe temperature control (stop, frequency drooping, etc.) is checked with the
temperature being detected by the discharge pipe thermistor.
Malfunction
Decision
Conditions
"
If a stop takes place 6 times straight due to abnormal discharge pipe temperature, the
system will be shut down.
"
If the temperature being detected by the discharge pipe thermistor rises above 120°C, the
compressor will stop. (The error is cleared when the temperature has dropped below
107°C.)
Stop temperatures (in the case of 3MXS52BVMB)
(1) 110°C when the frequency rises above 45 Hz or drops below 40 Hz.
(2) 102°C when the frequency rises from 30 Hz to 45 Hz or drops from 40 Hz to 25 Hz.
(3) 98°C when the frequency rises just up to 30 Hz or drops below 25 Hz.
"
The error counter will reset itself if this or any other error does not occur during the following
60-minute compressor running time (total time).
Supposed
Causes
"
Refrigerant shortage
"
Four way valve malfunctioning
"
Discharge pipe thermistor defective
(heat exchanger or outdoor temperature thermistor defective)
"
Outdoor unit PCB defective
"
Water mixed in the local piping
"
Electronic expansion valve defective
"
Stop valve defective
Troubleshooting
Check No.4
Refer to P.205
Check No.6
Refer to P.207
Check No.11
Refer to P.210
Repl
a
ce
a
defective
thermi
s
tor.
Repl
a
ce the v
a
lve it
s
elf or
the coil.
Refer to the refriger
a
nt line
check proced
u
re.
Repl
a
ce the o
u
tdoor
u
nit
PCB.
(R2
8
46)
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.
Check No. 6
Check the thermi
s
tor
s
.
M
a
lf
u
nctioning
M
a
lf
u
nctioning
F
u
nctioning
F
u
nctioning
F
u
nctioning
C
heck No.
11
Check the refriger
a
nt line.
M
a
lf
u
nctioning
C
heck No.
4
Check the electronic exp
a
n
s
ion
v
a
lve.
Refriger
a
nt
s
hort
a
ge
Fo
u
r w
a
y v
a
lve m
a
lf
u
nctioning
W
a
ter mixed
S
top v
a
lve defective
Di
s
ch
a
rge pipe thermi
s
tor
O
u
tdoor
u
nit he
a
t exch
a
nger thermi
s
tor
O
u
tdoor temper
a
t
u
re thermi
s
tor
Summary of Contents for Super Multi NX C-Series
Page 6: ...SiE12 411 Table of Contents v Index i Drawings Flow Charts v...
Page 7: ...SiE12 411 vi Table of Contents...
Page 67: ...Specifications SiE12 411 56 Specifications...
Page 171: ...Instruction SiE12 411 160 System Configuration...
Page 225: ...Check SiE12 411 214 Service Diagnosis...
Page 295: ...SiE12 411 iv Index...
