Maxx ice MIM50-O, MIM-50 User Manual

Automatic Ice Maker

Service Manual

MIM-50, MIM50-O

Table of contents

How the Icemaker works ------------------------------------------------------------3-10

Cooling System -----------------------------------------------------------------3 Water System ----------------------------------------------------------------- 4-5 Wiring Connections and Controller------------------------------ ----------6-8

Exploding Drawing -----------------------------------------------------------9-10

TroubleShooting ------------------------------------------ --------------------------- 11-17

Before Maintenance-------------------------------------------------------------11 Basic Checking ------------------------------------------------------------------11 TroubleshootingGuide------------------------------------------------------ 12-17

Adjustment and Replacement----------------------------------------------------- 18-19

Replace the controller----------------------------------------------------------18

Replace the water pump-------------------------------------------------------18 Replace the compressor-------------------------------------------------------19

Replace the fan motor and fan blade------------------------------------ ----19

Replace the hot gas valve, drier and evaporator-------------- -------------19

IMPORTANT: The service manual is based on the user manual. Before servicing, please read user manual and service manual carefully. The service operation should be implemented by qualified technician.

How the Icemaker Works

Please refer to the section “Operation of user manual” from page 13 to 16 . It describes clear how the icemaker makes ice and uses the water. There are 3 systems including Cooling System, Water System and Wiring Connection and Controller.

Cooling System

NUMBER DESCRIPTION 1 Condenser

2 Multi-connection pipe 3 Hot gas solenoid valve 4 Drier & Filte 5 Capillary tube

6 Hot gas tube 7 Suction tube 8 Compressor

9 Fan motor

9.1 Fan motor support

9.2 Fan blade 10 Discharge tube 19 Wiring harness

39.1 Temperature sensor of the condenser

39.2 Temperature sensor of the evaporator 46 Evaporator (Ice Mold)

39 Controllerbox

During the ice-making stage, the hot gas solenoid valve is closed. The hot refrigerant gas is pumped out off compressor to condenser. The hot gas is cooled by fan forced air to warm liquid refrigerant after passing through the condenser. The drier & filter reduces the possible dirty and humidity in the refrigerant. The evaporator is cooled by the refrigerant. So ice can formed on the evaporator during water is sprayed to the evaporator. Low pressure refrigerant gas may go back compressor from the evaporator.

During the ice harvest stage, the solenoid valve is open. The hot refrigerant gas is pumped out off compressor to evaporator through hot gas valve. As the hot gas is not cooled by the condenser, the refrigerant makes the evaporator (ice mold) warm. So some ice touching the evaporator is thawed. All of ice can slide down to the ice storage bin.

Water System

When the water supply pipe is connected with the main water supply, water will fill the water trough through the floater valve till enough water inside water trough makes floater valve close. During ice-making stage, water is pumped from the water trough to the water distribution tube. The distributed water flow the surface of evaporator. Most parts of water go back water trough. Some water is frozen on the evaporator step by step. The floater valve will open and fresh water is recruited at any moment.

NUMBER DESCRIPTION NUMBER DESCRIPTION 23 Water pump 25 Water pump inlet tube 26 Water pump outlet tube 32 Floater valve 33 Water inlet 34 Nut of water inlet tube 36 Water inlet tube 38 Water supply pipe 45 Water distribution tube 46 Evaporator 48 Ice slideway 49 Ice full probe 57 Water trough 59 Water trough drain tub

Wiring Connection : Circuit Description

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