Bartscher F 80C, Service Manual

Page: 17 / 42

GB
17
FIG. 6
2
1 L
N
C
O
M
P
R
E
S
S
O
R
9
10
11
12
13
3
4
5
6
7
8
CONTACTOR COIL
GEAR MOTOR
FAN MOTOR
ELECTRONIC
CARD
RELAYS
TRIAC
RESET
S
E
N
S
O
R
S
WATER
LEVEL
GEAR MOTOR ROTATION
CONDENSER TEMP.
EVAPORATOR TEMP.
ICE LEVEL CONTROL
TRANSF.
T<1
°
C
D
A
T
A
P
R
O
C
E
S
S
O
R
11
10
9
1
2
L
N
8
7
6
5
4
3
13
12
The refrigerant suction or Lo-pressure sets - in
normal ambient conditions - on the value of 0.5
bar (7 psig) on F120 after few minutes from the
unit start-up.
This value can vary of 0.1 or 0.2 bar (1.5÷3
psig) in relation to the water temperture varia-
tions influencing the freezer cylinder.
NOTE.
In case the condenser temperature
probe senses that the condenser temperature
has rised to 70°C on air cooled version - or
60°Conwater cooled version - for one of the fol-
lowing abnormal reasons:
CLOGGED CONDENSER
(Air cooled version)
INSUFFICIENT FLOW OF COOLING
WATER (Water cooled version)
FAN MOTOR OUT OF OPERATION
(Air coo-
led version)
AMBIENT TEMPERATURE HIGHER THEN
43°C (110°F)
it causes the total and immediateSHUT-OFF of
the machine (compressor first and gear motor
3' later) in order to prevent the unit from opera-
ting in abnormal and dangerous conditions.
When the ice maker stops on account of this
protective device, there is a simultaneous
glowing of the
RED LED
, warning the user of
the Hi Temperature situation.
The machine will remain in OFF mode for one
hour then it will restart automatically.
In case the unit trips OFF again in alarm for 3
times in 3 hours, the machine SHUTS OFF DEFI-
NITIVELY.
After having eliminated the source of the exces-
sive condenser temperature, to restart the ice-
machine it is necessary to unplug and plug in
again.
The RED LED starts blinking and three minutes
later the flaker unit resume its normal operating
mode. The condenser temperature sensor has a
further safety function which consist in preven-
ting the unit from operating in Lo-ambient condi-
tions i.e. when the condenser temperature -
equivalent to the ambient temperature - is lower
then 1°C 34°F (Fig.6).
As soon as the ambient temperature rises up to
5 °C the P.C. Board restarts automatically the
machine on the three minutes starting time.