Cornelius 322 manual Circuit Board Diagnosis

Page 21

CIRCUIT BOARD DIAGNOSIS

Turn the power switch OFF, and center position. Disconnect the proximity switches and thermistors from the circuit board. Remove a sleeve jumper from the options terminal and place it on terminals 4 and 5 of the test plug. Turn the power switch to the “ON”position and remove the sleeve jumper from terminals 4 and 5. The LED indicators will cycle “on”for approximately 2 seconds each in the following sequence.

1. Red D-5 (error)*

*Will only cycle if ice thickness (pot) is within factory setting

2.

Green

D-6

(condenser fan)

3.

Green

D-11(hot gas valve)

4.

Green

D-12

(water pump)

5.

Green

D-14

(relay-contractor)

6.

Green

D-15

(dump valve)

Failure of the LED’s to cycle in this sequence will signal a defective circuit board.

Options Plug

Sleeve Connector

Dump

Dump

Dump

Dump

Every

Every

Every

Every

Cycle

3rd

5th

7th

 

Cycle

Cycle

Cycle

 

D-13

D-15

Water

 

 

 

 

 

Dump

 

 

 

 

 

 

Valve

 

 

 

RH Evap. Switch

YL

 

 

 

 

 

 

 

D-14

Contactor

7

8

 

 

RH Evap.

 

 

 

 

 

 

 

 

 

 

Water

5

6

 

 

YL

 

3

 

 

LH Evap. Switch

 

Pump

4

 

D-10

D-12

 

2

 

 

1

 

 

 

 

 

LH Evap.

 

 

 

 

 

 

 

 

Condenser Sensor

 

 

Hot Gas

 

 

Condenser

GR

 

 

 

White

D-11

 

 

 

plug

 

 

 

230v

 

 

 

 

Suction Line Sensor

Suction plug

 

 

Voltage

 

Brown

Fan

 

neutral

 

 

D-6

 

Selector

 

 

 

 

 

Test

 

 

Switch

115v

 

 

GR

 

 

 

Plug

RD

 

 

 

 

 

 

 

 

D-5

 

 

 

 

Options

Error

 

 

 

 

 

 

 

 

 

 

 

Plug

Adjustable Ice

 

 

 

 

 

Thickness Pot.

Transformer

 

 

 

 

 

 

 

 

 

Micro Processor

 

 

 

 

 

Stacking

 

 

 

 

 

 

Cable

 

Manual

 

 

 

 

Plug

 

 

 

 

To Stacked

 

 

Harvest

 

 

 

Unit

 

 

Switch

 

 

 

(if required)

 

 

 

 

 

 

166240008

18

3/17/95

Image 21
Contents Series ICE Cube Machine Table of Contents Table of Contents cont’d Understand Signal Words Recognize Safety InformationFollow Safety Instructions CO2 Carbon Dioxide WarningThis page Left Blank Intentionally Unpacking SpecificationsElectrical Plumbing ConnectionsLeveling Unit LocationUnit SET-UP Make Electrical Power Supply Connection Make Plumbing ConnectionsFor water cooled units Drain Connection Installation Instructions DrainWater Level Reservoir Starting the Unit Installation Instructions for Mounting on Drink Dispensers Checkout Procedure For Harvest Bin SwitchesAdjustment Procedure For Harvest Bin Switches Sanitizing and Cleaning Procedure Cleaning the AIR Cooled Condenser Coil Water TreatmentWinter Storage Average Operating Characteristics AIR Cooled Condenser 17/95 Dump Cycle Adjusting Bridge Thickness Total ICE CapacityICE Production Check LED Indicators Pre-Chill Mode Status IndicatorCircuit Board Diagnosis Test Plug Reset OperationSensors Voltage ChecksSensor Thermistor Diagnosis Voltage Selector SwitchThermostatic Expansion Valves SensorsStarving TXV Product Symptoms Flooding TXV Product SymptomsWater Regulating Valve Moisture Contamination Service Stem ValvesCompressor & Starting Component CHECK-OUT Procedure Compressor ContactorRelay Compressor CapacitorsSystem Evacuation & Recharging SELF-CONTAINED ProductsLeak Detection Refrigerant Definitions Ashrae Condenser FAN Cycling Control High Pressure Safety SwitchIMI Cornelius INC IMI Cornelius INC

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