31
Maintenance and care
: Trouble shooting
Solution
-
Replac
e fan
Replac
e fan
Replac
e t
emper
a-
tur
e sensor
Clean c
ondenser c
oil
Replac
e t
emper
a-
tur
e sensor
Replac
e sensor
M
ov
e displa
y closer
.
Change ba
tt
er
ies
in r
emot
e c
on
tr
ol
panel
.
Fault finding
See LPC
o fault finding pr
oc
edur
es
Confir
m fan is w
or
king
.
If fan swit
ches off f
or no appar
en
t r
eason it is
likely caused b
y the in
ter
nal fan mot
or ther
-
mal pr
ot
ec
tion cir
ctuit
. I
t will disable the fan if
the winding t
emper
atur
e is t
oo high.
Confir
m fan is w
or
king
.
M
easur
e r
esistanc
e of the t
emper
atur
e pr
obe
bet
w
een the
“”
cond
”” and
“”
gnd
”” t
er
minals in
the
“”
temp
”” sec
tion of the PCB
.
Resistanc
e should be in the r
ange 190kOhm -
0,14kOhm, c
or
responding t
o -50..98°C.
If r
esistanc
e is not within this r
ange the sensor
is def
ec
tiv
e or sensor cable is br
oken/shor
t
cir
cuit
ed
Inspec
t c
ondensor c
oil fins f
or dust/debr
is
.
M
easur
e r
esistanc
e of the t
emper
atur
e pr
obe
bet
w
een the t
er
minals of the c
or
responding
sensor in the
“”
temp
”” sec
tion of the PCB
.
Resistanc
e should be in the r
ange 190kOhm -
0,14kOhm, c
or
responding t
o -50..98°C.
If r
esistanc
e is not within this r
ange the sensor
is def
ec
tiv
e or sensor cable is br
oken/shor
t
cir
cuit
ed
Confir
m if the sensor and/or cable is visibly
damaged
.
Check tha
t r
emot
e c
on
tr
ol panel is On.
Check ba
ttt
er
ies in r
emot
e c
on
tr
ol panel
.
Unit b
eha
viour
LP fault is tr
igger
ed
.
HP fault is tr
igger
ed
Unit seemingly oper
ating nor
mally
, self check will
reset fault c
ondition
HP fault is tr
igger
ed
. S
elf-t
est will not r
eset the
fault c
ondition
HP fault is tr
igger
ed
self check will not r
eset fault c
ondition
Displa
y sho
w
s SENS er
ror f
ollo
w
ed b
y E
VAP or
COND when ar
ro
w key
s ar
e pr
essed
, indica
ting
fault in either c
ondenser or ev
apor
at
or sensor
Displa
y sho
w
s SENS er
ror f
ollo
w
ed b
y R
h°t when
ar
ro
w key
s ar
e pr
essed indica
ting failur
e of the
combined t
emp
./RH-sensor
.
-
Possible c
ause
LPC
o fault has been tr
igger
ed t
oo man
y times
consecutiv
ely
Fan failur
e, per
iodic
Fan failur
e
HP t
emper
atur
e sensor fault
Condenser c
oil clogged
Sensor malfunc
tion
Lost c
ommunica
tion t
o pair
ed r
emot
e c
on
tr
ol
panel
Fault
LP fault
HP fault
Sensor failur
e
-
Ty
pe
A
lar
m
A
lar
m
A
lar
m
In
fo
D
ispla
y t
ex
t
LP
HP
SENS
LOSS
en
