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SAFETY WARNING - ELECTRICAL & REFRIGERANT SYSTEMS

Commercial ice machines contain high-pressure refrigerant systems and dangerous electrical components. Always consult manufacturer service manual for your specific model before attempting repairs.

M

Manitowoc Error Codes E01-E20 Guide

Accurate diagnostic guide for Manitowoc error codes based on manufacturer specifications. Indigo series and all commercial models covered.

🚨 Primary Manitowoc Error Codes

Most common error codes with manufacturer-verified solutions

E01

E01 - Long Freeze Cycle

Ice machine taking too long to complete freeze cycle

Possible Causes:

  • • Water flow issues affecting ice formation
  • • Refrigerant system problems
  • • High ambient temperature conditions
  • • Dirty condenser reducing efficiency
  • • Water temperature too high

Troubleshooting Steps:

  • 1. Check water supply flow and temperature
  • 2. Inspect condenser for debris/blockage
  • 3. Verify ambient temperature within spec
  • 4. Check refrigerant levels (professional only)
E02

E02 - Long Harvest Cycle

Machine struggling to release ice during harvest phase

Possible Causes:

  • • Ice thickness probe malfunction (see E19)
  • • Insufficient heat during harvest cycle
  • • Scale buildup on evaporator surfaces
  • • Harvest assist mechanism problems
  • • Hot gas valve issues

Troubleshooting Steps:

  • 1. Check ice thickness probe (E19 section)
  • 2. Clean evaporator of scale buildup
  • 3. Test harvest assist operation
  • 4. Verify hot gas valve function
E03

E03 - Input Power Loss

Power supply interrupted or lost during operation

Typical Causes:

  • • Power outages or electrical interruptions
  • • Loose electrical connections
  • • Circuit breaker tripping
  • • Voltage fluctuations
  • • Houston storm-related power issues

Resolution:

  • 1. Check all electrical connections
  • 2. Verify circuit breaker status
  • 3. Test voltage supply stability
  • 4. Reset using on/off button

🔧 E19 - Ice Thickness Probe Fault

Critical for proper ice formation - requires precise adjustment

Probe Inspection Checklist

1

Physical Damage Check

Inspect for cracks, bulging, or visible damage on probe body

2

Movement Verification

Ensure probe can swing freely without restriction from wiring

3

Factory Setting Check

Verify 1/8 inch (3mm) ice bridge thickness setting

Probe Adjustment Procedure

CRITICAL: Factory setting is 1/8 inch (3mm) ice bridge thickness

Clockwise: Increases ice thickness
Counterclockwise: Decreases ice thickness
120° Turn: Equals 1/16 inch (1.5mm) adjustment

Houston Hard Water Note:

Houston's hard water can cause scale buildup affecting probe sensitivity. Clean probe regularly and consider water treatment systems.

E20

E20 - Water System Fault

Water-related problems affecting ice production

Water Flow Issues

  • • Insufficient water flow rate
  • • Water supply valve problems
  • • Distribution system blockages

Water Quality Problems

  • • Hard water mineral buildup
  • • Dirty/clogged water filters
  • • Water temperature issues

System Components

  • • Water pump malfunction
  • • Level sensors dirty/faulty
  • • Distribution manifold issues

❄️ Refrigerant System Error Codes

WARNING: Refrigerant system repairs require EPA certification and specialized equipment. Contact qualified technician for these errors.

E07 - Starving TXV

Starving evaporator (single TXV systems) or low refrigerant charge

Requires professional diagnosis

E08 - TXV Fault

Thermal expansion valve problems in single or dual circuit systems

Professional service required

E09 - Flooding Evaporator

Single evaporator, single circuit system flooding

Refrigerant system issue

E10 - Flooding Evaporator

Dual TXV, dual circuit system flooding fault

Advanced system diagnosis needed

🔄 Manitowoc Reset Procedure

Standard Reset Method

1

Press On/Off Button

Use the on/off button to reset the safety limit and start a new ice-making cycle

Note: If machine displays solid glowing indicator (not blinking), it will stop operating and may require professional service for persistent error codes.

⚠️ Important Disclaimer

Manufacturer Specifications: Error code meanings based on official Manitowoc documentation and service manuals.

Professional Service Required: Refrigerant system errors (E07-E10) require EPA-certified technicians with proper equipment.

Model Variations: Some error codes may vary by model year and series. Always consult your specific model's service manual.

Safety First: High-pressure refrigerant systems can cause injury. When in doubt, contact qualified service technician.

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