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Air Cooled 550 lb.
Modular Nugget
Ice Machine
Model:
Modular Head: 194MN522A
Head & Bin Kits: 194KMN522BA, 194KMN522HA, 194KMN522LA
Note:
Read the manual thoroughly prior to equipment setup, operation, and maintenance. A licensed and insured
electrician/plumber or food service technician is required to carry out any servicing on this equipment.
Review all hazard statements in the user manual before interacting with or servicing this equipment.
www.AvantcoIce.com
1
Service Manual
User Manual
Air Cooled Modular Nugget Ice Machine
04/2025
194KMN522HA
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Table of Contents
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Summary of Contents for Avantco 194KMN522HA
- Page 1 Ice Machine Model: Modular Head: 194MN522A Head & Bin Kits: 194KMN522BA, 194KMN522HA, 194KMN522LA Note: Read the manual thoroughly prior to equipment setup, operation, and maintenance. A licensed and insured electrician/plumber or food service technician is required to carry out any servicing on this equipment.
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Page 2: Table Of Contents
User Manual Air Cooled Modular Nugget Ice Machine Refrigeration System All EPA, federal, and local guidelines need to be followed when working with refrigeration. Follow all guidelines and safety procedures when WARNING: DANGER working with a flammable refrigerant. All connections where refrigerant Flammable Refrigerant Used travels must be checked for leaks after connections are brazed in place. -
Page 3: Installation & Operation
User Manual Air Cooled Modular Nugget Ice Machine Installation The installation location should meet the following conditions: • Indoors, at an altitude of 2,000 meters or less. • Ambient temperature: 40-90°F (5-33°C). • Power supply: Rated voltage on the nameplate ± 6%. •... -
Page 4: Error Codes
User Manual Air Cooled Modular Nugget Ice Machine NOTE: The following should be checked prior to diagnosing issues: • With the water supply off, remove the inlet hose from the back of the ice machine and inspect/clean the plastic screen inside the inlet valve. Then, reconnect the hose. •... -
Page 5: Access Points
User Manual Air Cooled Modular Nugget Ice Machine Access Points Fig. 1 Fig. 2 Exterior Panels Facing the front of the unit, look for (2) quarter-turn latches on the top panel (Fig. 1). Rotate the latches clockwise with a straight slot screwdriver. Lift and remove the top panel. -
Page 6: Part Testing
User Manual Air Cooled Modular Nugget Ice Machine Part Testing Fig. 11 Fig. 12 Compressor and Capacitor Access the control board and right side panels. With the unit ON and controller calling for the compressor to run, check amperage on the compressor wire coming from the controller board (Fig. -
Page 7: Condenser Fan & Capacitor
User Manual Air Cooled Modular Nugget Ice Machine Condenser Fan and Capacitor Fig. 17 Fig. 18 Condenser Fan Condenser Fan Access the control board and right side panels. Connection Connection Ensure controller is in the ice-making process. 2. Check for line voltage at the condenser fan connection - the white connector on the right-hand side of the controller board (Fig. -
Page 8: Suction Line Temperature Sensor
User Manual Air Cooled Modular Nugget Ice Machine Suction Line Suction Line Suction Line Temperature Sensor Fig. 22 Fig. 23 Temperature Temperature Suction Line- Suction Line- Sensor Probe Sensor Probe Access the control board and left side panels. Locate Temperature Temperature the suction line temperature sensor probe where the Sensor... -
Page 9: Ice Bin Full Sensor
User Manual Air Cooled Modular Nugget Ice Machine Ice Bin Full Sensor Fig. 30 Fig. 31 Ice Full Sensor Ice Full Sensor • NOTE: If the display shows "FUL" in the digital panel, Connection Connection ensure that ice is cleared from the sensor area for a minute to allow it to reset. -
Page 10: Auger Motor & Compressor Cts
User Manual Air Cooled Modular Nugget Ice Machine Auger Motor and Compressor Current Fig. 36 Fig. 37 Compressor Current Compressor Current Transformers Transformer Transformer Compressor Compressor With the unit unplugged, remove the current Current Current transformer connector from the control board (Fig. 36). Connection Connection Auger Motor... -
Page 11: Display Panel
User Manual Air Cooled Modular Nugget Ice Machine Display Panel Fig. 42 Fig. 43 Display Display Connection Connection If the display panel is not lit when the unit is plugged in, access the control panel behind it (Fig. 42). 2. At the display connection with the unit on, verify there is 5 volts coming from (2) right-hand pins (Fig. -
Page 12: Part Replacement
User Manual Air Cooled Modular Nugget Ice Machine Part Replacement Refrigeration System WARNING: DANGER All EPA, federal, and local guidelines need to be followed when working Flammable Refrigerant Used with refrigeration. Follow all guidelines and safety procedures when working with a flammable refrigerant. All connections where refrigerant DISCONNECT POWER travels must be checked for leaks after connections are brazed in place. -
Page 13: Condenser Fan/Capacitor
User Manual Air Cooled Modular Nugget Ice Machine Condenser Fan/Capacitor Fig. 52 Fig. 53 Condenser Fan Condenser Fan Access the control board and right side panels. Capacitor Capacitor 2. Disconnect the condenser fan connector on the outside of the control panel area (Fig. 52). 3. -
Page 14: Suction Line Temperature Sensor
User Manual Air Cooled Modular Nugget Ice Machine Suction Line Suction Line Suction Line Temperature Sensor Fig. 57 Fig. 58 Temperature Temperature Sensor Probe Sensor Probe Suction Line- Suction Line- Access the control board and left side panels. Temperature Temperature Remove the insulation and wire ties holding the sensor Sensor Sensor... -
Page 15: Ice Bin Full Sensor
User Manual Air Cooled Modular Nugget Ice Machine Ice Bin Full Sensor Fig. 64 Fig. 65 Ice Full Sensor Ice Full Sensor The sensor is mounted at the bottom of the ice chute Connection Connection on the interior of the unit and has two halves (Fig. 64). 2. -
Page 16: Auger Motor, Capacitor, & Gearbox
User Manual Air Cooled Modular Nugget Ice Machine Auger Motor, Capacitor, and Gearbox Fig. 70 Fig. 71 Auger Motor Auger Motor Bulkhead Bulkhead Access the control board and the top and left side Connector Connector panels. The auger motor will be toward the front of the unit on the left side (Fig. -
Page 17: Auger Seals
User Manual Air Cooled Modular Nugget Ice Machine Auger Seals Fig. 80 If replacing the auger shaft or gear motor assembly, or if there is a water leak coming from inside of the modular ice machine head, some or all of the seals Ice Squeeze Head Ice Squeeze Head and O-rings may need to be replaced. -
Page 18: Auger Motor & Compressor Cts
User Manual Air Cooled Modular Nugget Ice Machine Auger Motor and Compressor CTs Fig. 83 Fig. 84 Compressor Current Compressor Current Remove the current transformer (CT) connector from Transformer Transformer the control board (Fig. 84). Compressor Compressor Current Current 2. Count the wire windings on the auger motor CT Connection Connection before removing the wire. -
Page 19: Wiring Diagram
User Manual Air Cooled Modular Nugget Ice Machine Wiring Diagram #194MN522A Part Description Part Description Auger Current Transformer Defrost Valve Auger Motor Condenser Fan Auger Motor Capacitor FUSE 6.3A Board Fuse Compressor Current Transformer High Pressure Switch Condenser Fan Capacitor Ice Full Sensor Compressor Junction Block... -
Page 20: Parts Diagram
User Manual Air Cooled Modular Nugget Ice Machine Parts Diagram Part No. 08.0.0053-0 02.2.0067-0 08.0.0005-0 02.2.0041-0 06.2.0163-0 06.5.0020-0 06.4.0008-0 06.1.0010-0 06.0.0011-0 06.6.0020-0 08.1.0021-0 08.1.0062-0 08.7.0060-0 13.2.0002-0 07.0.0060-0 07.0.0025-0 04.0.0078-0 02.2.0066-0 08.1.0030-0 06.4.0027-0 08.1.0008-0 08.1.0026-0 06.4.0002-0 08.6.0032-0 Description Item # Description Item # Display Cover Ice Mouth...
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