Service manual

14
Service Information
Thermistor Types
Type 1 (Black)
Resistanceat77°F=10,000ohms±5%
Operatingrangeis185,000to650ohms.
Resistancegoesdownastemperatureincreases.
Type1doesnotneedtobecalibratedandcanbe
changedwithoutchangingotherwiresorboard.
Type 2 (White)
Resistanceat77°F=5,000ohms±5%
Operatingrangeis180,000to550ohms.
Resistancegoesdownastemperatureincreases.
Type2doesnotneedtobecalibratedandcanbe
changedwithoutchangingotherwiresorboard.
36
Model CLR2160
Operation
Figure 1
HIGH PRESSURE
LOWPRESSURE
TRANSITIONAL PRESSURE
IN CAPILLARY TUBE
H
L
C
L
L
C
C
C
C
C
L
L
H
H
C
L
ICEMAKER EVAPORATOR
2276
R4: WATER
SUPPLY
R5: WATER
CIRCULATION PUMP
R4: HOT GAS
BYPASS
VALVE
R1: CONDENSER
FAN
CONDENSER
R3: COMPRESSOR
RELAY R1 R3 R4 R5
FUNCTION FAN
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON/OFF
ON*
ON
OFF
OFF
ON/OFF
OFF
COMP CIRC PUMP
HOT GAS /
WATER IN
Mode 1:
Ice Making
Mode 2:
Ice Harvest
Mode 3:
Off
Mode 4:
Cleaning
Mode 5:
Water Fill &
Initial Start-Up
* Normal Start-Up lasts 3 minutes
Note: R2, R6 and R7 not used
29
Thermistor Types
Type 1 (Black)
Resistance at 77°F = 10,000 Ohms ± 5%
Operating range is 185,000 to 650 Ohms. Resistance goes
down as temperature increases. Type 1 does not need to
be calibrated and can be changed without changing other
wires or board.
Type 2 (White)
Resistance at 77°F = 5,000 Ohms ± 5%
Operating range is 180,000 to 550 Ohms. Resistance goes
down as temperature increases. Type 2 does not need to
be calibrated and can be changed without changing other
wires or board.
Refrigeration System Diagnosis Guide
System
Condition
Suction
Pressure
Suction
Line
Compressor
Discharge
Condenser Capillary
Tube
Evaporator Wattage
Normal Normal Slightly below
room
temperature
Very hot Very hot Warm Cold Normal
Overcharge Higher than
normal
Very cold -
may frost
heavily
Slightly warm
to hot
Hot to warm Cool Cold Higher than
normal
Undercharge Lower than
normal
Warm -
near room
temperature
Hot Warm Warm Extremely cold
near inlet -
outlet below
room
temperature
Lower than
normal
Partial
Restriction
Somewhat
lower than
normal -
in vacuum
Warm -
near room
temperature
Very hot Top passes
warm -
lower passes
cool (near room
temperature
due to liquid
Room
temperature
(cool) or colder
Extremely cold
near inlet -
outlet below
room
temperature
backing up
Lower than
normal
Complete
Restriction
In deep
vacuum
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
No
refrigeration
Lower than
normal
No Gas 0 PSIG
to 25"
Room
temperature
(cool)
Cool to hot Room
temperature
(cool)
Room
temperature
(cool)
No
refrigeration
Lower than
normal