Control Board - MTA DEOO3 Manual De Instrucciones Y Mantenimiento

Enqlish
PROBLEii| CAUSE
SYMPTOM
REiIEDY
H
Lo\i, pressure switch (LP) lrips
(see
ncdes
3')
H1
No
refrigerant fluid
in
the circuit
(see
also
A1
0).
Refrigerant compressor stopsi
The alarm signal relative
to
the
problem
is
displayed
on
the
eleclronic board (see notes 2')
main alarm relay tripped
(see
notes 1').
H'l.l
Call
in a
qualitied
refrigeration
engineer
to
check
lor leaks and fill
up
refrigerant circuit.
H2
Vvhen starling
the
unit
for the
firsl
lime, the ambient
temperature
is
too
lot
r
and
the
thermal mass
is al
the
same lemoeralure
H2.1
See H1.1
lncrease ambient temperature
to
above the min. value,
by
introducing
warm compressed
air.
Compressor proteclion trips.
ll
Compressed
air
florv
or
lemperalure
too high
combined
with high
ambienl
temperalures.
The head and
the
body
of
the
compressor
are
very
hol;
lhe compressor slops and tries to
reslart
afler a
short
time (even
a
few seconds)
H.l
Stop
lhe
unil and reduca
the air
flow
and
lemperature to within rated limits.
Wait a few mindes before starting
lhe
unit again (see notes
8')
t2
Compressed
air
florl
or
temperature
too
high combined
with a shortage of
refrioerant (see
also
410).
t2.1
See
11.1
Call
in a
qualitied
refrig€ration
engineer
to
check
for leaks and fill
up
the circuit with refrigeranl (see
notes
8')
l3
See ooints G1 to G8.
t3.1
See
11
1
See points
G1
to
GB
(se6 noles
8')
K
All
LED'S
off although the main swilch
lG
is on ("1")
KI
Control board circuit breaker
trips.
Power supply
fl
ucluations
or'spikes'.
Kt.1
Despite
the
presence of power at
the
input terminals, the digital display and
all
LED'S
remain unlit
Provide cleaner power supply lo
lhe
dryer
K2
Abnormal
poiler
consumption
by
one
or
more
of the
control
board
comoonenls.
l<2.1
See K1
1
lf the circuil breaker continues
to
trip,
replace the control board.
L
Temperature probe fault alarm
(see
notes
2')
LI
Probes
in
open circuit
or
in
short
circuit.
Lt.1
Refrigerant compressor stops;
main alarm relay lripped
(see
notes 1').
Check that
the
temperature probe
is
corredly
connecled
to the
control
board terminals
and lhat the cable is
undamaged.
lf
necessary replace the
temoeralrrre
Drobe
M
General available alarm is displayed.
M1
An alarm
device tripped
and
the signal
was
sent to
the board through the input
lerminals of
the available alarm, as
envisaged
by
lhe attached electrical
diagram.
M1.t
.
Main alarm relay tripped
(see
noles 1');
the
problem
is
displayed
on
the
eklronic
board
{se
noles
2')
ldentify
and
remove
the
cause
of lhe
alarm.
N
Compressor
stops due
to
the
safety
thermostal lripping (see notes
3')
N1
The
temperature measured
by
lhe
thermostat
is
lower
than
that
measured
by the control board probe
and therefore lhe thermostat stops the
c,ompressor.
Nt.t
The
compressor
slops even
if
the
lemperature measured
by
the
elec{ronic
board probe is
higher lhan
the
Set
value
of
the electronic board
Check that lhe electronic board
Set
is
nol lower than
the
safety
lhermostat
set.
The dew-point
should
remain under
control.
lf
lhe dew-point
is still
too
high,
reverse
the positions
of the
control
board
temperature
probe and
the
safety
thermoslat lemperalure
probe.
lf
this
doesn't solve
the
problem,
ontact
the nearesl service c€nlre.
o
One
of the
salety thermoslat alarms
lriB
{see noles
3')
ot
See relative
chapter (see notes 3').
01.1
See
Ol
See
Ol
P
Alarm relative to
the microprocessor or
its Eprom memory (see notes
2')
PI
Control board
microprocessor
initialising
error
or
microprocessor
mistake in reading
data.
P1.t
The
alarm signal
relativ€
to
the
problem is displayed on
the electronic
board (see notes
2')
and
lhe
unit
is
blocked.
Turn
th6
unit
df
and
on.
lf
this doesn't solve
the
problem,
contacl the
neares{
service centre.
o
Aulomatic srritches or fuses fitted
on
the unit
trip (see wiring diagram).
QI
Compressor
motor
or
compressor
supply line shorl-circuited.
Ql.l
Tho crmpressor doesn't start even if
the thermostat func{ion requires
it to.
Use
a
lester
to
check
lhe
motor
windings and supply line.
Replace tho compressor or the c€ble
if
nocessary.
Redace
the
fuse
o.
reset
the
automatic swilch- (see notes
8')
a2
Shorl-ciroit of solenoid valve, fan and
eleclronic board supply lines
Q3.2
Apparent power supdy failure.
Use a tester
to check the components
and
cables.
Replace
lhe
damaged
component or cable.
Redace
th€ fuse
or
reset
the automatic switch. (see
mles 8')
Q3
Short circuit
in
the fan or
in
the fan and
transformer auxiliary pow€r lines,
Q3.1
See
O3.2.
Use a tesler to chec* the componenls
and cables.
Replace
the
damaged
componenl or
elble. (see notes 8')
Redace
the
fuse
or
res€t
lhe
aulomalic
$ilch
19