Scotsman MC 15 Service Manual page 17

Page 17
I. Check the texture of ice cubes just released.
They have to be in the right shape with a small
depression of about 5-6 mm in their crown.
If not, wait for the completion of the second cycle
before performing any adjustment.
If required, the length of the timed freezing cycle
can be modified by changing the DIP SWITCH
keys setting as illustrated in OPERATING
PRINCIPLE.
If the ice cubes are shallow and cloudy, it is
possible that the ice maker runs short of water
during the freezing cycle second phase or, the
quality of the supplied water requires the use of
an appropriate water filter or conditioner.
J. To be sure of the correct operation of ice
level control device, place one hand between its
sensing "eyes" to interrupt the light beam.
The Bin Full YELLOW LED starts to blink, and
after 60 seconds, the unit stops with the
simultaneous glowing of the same LED to moni-
tor the BIN FULL situation (Fig.6).
Take the hand out from the ice level control
sensors to allow the resumption of the light
beam.
After approximately 6 seconds the ice maker
resume its operation with the immediate glowing
FIG. 6
- EVAPORATOR
- CONDENSER
- AMBIENT
Rx Tx
L
N
16
DIP
SWITCH
ELECTR.
15
TIMER
14
13
1
2 TRANSF.
of the FIRST YELLOW LED indicating UNIT IN
OPERATION and the extinguishing of the "BIN
FULL" YELLOW LED.
NOTE. The ICE LEVEL CONTROL
(INFRARED SYSTEM) is independent of
the temperature however, the reliability of its
detection can be affected by external light
radiations or by any sort of dirt and scale
sediment which may deposit directly on the
light source and on the receiver.
To prevent any possible ice maker
malfunction, due to negative affection of the
light detertor, it is advisable to locate the unit
where it is not reached by any direct light
beam or light radiation, also it is recommended
to keep the bin door constantly closed and to
follow the instructions for the periodical
cleaning of the light sensor elements as
detailed in the MAINTENANCE AND
CLEANING PROCEDURES.
K. Remove, if previously installed, the
refrigerant service gauges and re-fit the unit
service panels previously removed.
L. Instruct the owner/user on the general
operation of the ice machine and about the
cleaning and care it requires.
WATER DRAIN VALVE
7
8
9
10
RELAYS
3
4
5
TRIAC
6
RELAY
11
12
Page 17
WATER IN VALVE
HOT GAS VALVE
CONTACTOR COIL
FAN MOTOR
WATER PUMP
ELECTRONIC CARD