Scotsman MXG 327, Service Manual

Page: 26 / 36

Page 24
Page 24
LED STATUS REASON WHY
ON STEADY UNIT UNDER POWER
ON STEADY FREEZING CYCLE
BLINKING
60 MINUTES DELAY AT START UP
JUMPER J3 OUT
ON STEADY
TOO HI DISCHARGE
PRESSURE/TEMP
BLINKING
TOO HI EVAP. TEMP. (> 0C
°
)
AFTER 15’ FROM START UP
ON STEADY UNIT OFF AT BIN FULL
BLINKING
SLOW
I/R BEAM CUTTED
I/R ON AFTER TRIP OFF AT
BIN FULL
BLINKING
FAST
ON STEADY I/R CALIBRATION DONE
BLINKING
UNIT IN CLEANING MODE OR TRIPPING
OFF AFTER TEST - JUMPER TEST IN
ON STEADY
CONDENSER SENSOR OUT
OF ORDER
BLINKING
EVAPORATOR SENSOR OUT
OF ORDER
BLINKING
ALTERNATIVELY
I/R SENSOR OUT OF ORDER
PUSH
PUSH > 5” DURING WATER FILLING TO
MOVE THE UNIT INTO FREEZING
PUSH > 5” DURING FREEZING
TO MOVE THE UNIT INTO DEFROST
PUSH > 5” DURING DEFROST
TO MOVE THE UNIT INTO FREEZING
PUSH 2” > 5” DURING WATER FILLING
TO MOVE THE UNIT INTO CLEANING
PUSH DURING THE 60 MIN START UP
DELAY TIME TO BY-PASS IT
G. DIP SWITCH
The P.C.BOARD which controls the entire
operation of the ice maker, has a DIP SWITCH
with ten switching keys which allow to set up
the micro processor program in order to extend
or to shorten the length of freezing cycle in relation
to the different model and versions of ice machines.
The DIP SWITCH first four keys setting
determines the length of the 2nd phase of
freezing cycle (controlled by the electronic
timer) as detailed in the table B.
The DIP SWITCH keys 5 & 6 setting determines
the length of the defrost cycle according to the
size of the cubes (Large or Medium) as per the
following setting:
ON
ON : PROGRAM A
ON OFF : PROGRAM B
OFF OFF : PROGRAM C
OFF ON : PROGRAM D
LENGTH OF HARVEST CYCLE
ACCORDING TO THE TIME TO DROP THE
EVAP. TEMPERATURE FROM 0
°
C TO -15
°
C
LENGTH PROGRAMS
HARVEST
CYCLE A B C D
180” Up to 6’30” *** Up to 9’30” xxxx
165” 6’30”-7’ Up to 3’ 9’30”-10’ xxxx
150” 7’-8’ 3’-3’15’ 10’-11’ xxxx
135” 8’-9’ 3’15”-3’30” 11’-12’ xxxx
120” 9’-10’30” 3’30”-4’30” 12’-13’30” < 3'
105” 10’30”-12’ 4’30”-6’ 13’30”-15’ 3' - 4'
90” >12’ >6’ >15’ > 4'
The DIP SWITCH N
°
7 and 8 allow the extention
of the length of the harvest/defrost cycle according
to their combination as per following chart:
DIP SWITCH ADDITIONAL DEFROST TIME
7 8
ON ON 0
OFF ON 30"
ON OFF 60"
OFF OFF WATER PUMP OFF
LENGTH OF TIMED PORTION OF FREEZING CYCLE ACCORDING TO THE
DIP SWITCH SETTING COMBINATIONS
TAB. B