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Micro Matic MMPP4301-EP - User Manual

Micro Matic MMPP4301-EP
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MMPP4301-EP
MMPP4301
MMPP4301-WC
MMPP4301-PKG
MMPP4301-PKG-WC
MMPP4302
MMPP4302-WC
MMPP4302-PKG
MMPP4302-PKG-WC
MMPP4303-PKG
MMPP4303-PKG-WC
MMPP4303-PKG-3
MMPP4305-PKG
MMPP4305-PKG-WC
MMPP4305-PKG-3
MMPP4305-PKG-WC3
MMPP4307-PKG
MMPP4307-PKG-WC
MMPP4307-PKG-3
MMPP4307-PKG-3-WC
MMPP4307-PKG-4
MMPP4307-PKG-4-WC
POWER PACK
SERVICE MANUAL
v3.0

Table of Contents

Questions and Answers

  • M
    Molly WilsonAug 3, 2025
    Why is my Micro Matic MMPP4301-EP producing excessive foam?
    • M
      Martin RiveraAug 3, 2025
      Excessive foam in your Micro Matic Power Pack can stem from several factors. The walk-in cooler might be too warm; adjust the cooler temperature to between 36° and 38° F using a quality thermometer. Also, check the applied pressure to the keg and adjust the regulator for a proper flow rate of two ounces per second. Inspect the physical equipment from the keg to the faucet. Warm product lines can also cause foaming.
  • S
    Sarah HolmesAug 15, 2025
    What to do if the compressor on my Micro Matic MMPP4301-EP Power Pack does not run but hums?
    • H
      hollymartinezAug 15, 2025
      If the compressor on your Micro Matic Power Pack doesn't start but hums, several issues could be at play. First, check for inadequate voltage by measuring it across the common and run terminals on the compressor; it must not drop below 90% of the rated voltage. A malfunctioning starting relay could also be the culprit; replace it, ensuring you use the correct relay to prevent compressor failure. Lastly, the compressor itself might be malfunctioning, requiring replacement.
  • M
    Margaret RobinsonAug 21, 2025
    What to do if Micro Matic Power Pack compressor runs constantly and freezes up?
    • K
      Kimberly WeissAug 21, 2025
      If the compressor on your Micro Matic Power Pack runs continuously and doesn't cut off, leading to freeze-up, it could be due to a thermostat control failure; in this case, replace the thermostat. Alternatively, a Freon leak could be the cause; repair the leak and recharge the system.
  • B
    brittany63Aug 27, 2025
    How to troubleshoot a Micro Matic Power Pack when the compressor doesn't start but the fan runs?
    • M
      Michael MooreAug 27, 2025
      If the compressor on your Micro Matic Power Pack doesn't start (no hum), but the fan motor runs, it could be due to a compressor relay or capacitor malfunction; replace the compressor relay or capacitor. Inadequate voltage could also be the cause; measure the voltage across the common and run terminals on the compressor, ensuring it doesn't drop below 90% of the rated voltage. Finally, the compressor itself might have failed and require replacement.
  • E
    emily02Nov 8, 2025
    Why is the beer from my Micro Matic Power Pack warm?
    • K
      Krista RobersonNov 8, 2025
      Warm beer from your Micro Matic Power Pack can be caused by several issues: * A defective pump. Check the return line in the reservoir for liquid flow. Replace the pump on 125', 250', and 500' units, and also check the motor. Inspect the condition of the key between the pump and motor. * A defective motor (check pump also): Replace the motor. * Trunk lines located in an overheated area: Remove the lines from any hot water pipes or kitchen area with a stove or glass washer. * Trunk lines flooded in PVC chase: Remove lines from PVC, thoroughly dry the PVC, and repair or replace the trunk line as needed. * Uninsulated or poorly insulated lines: Ensure all lines are fully insulated from the cooler into the dispenser, including glycol lines from the power pack into the cooler. * T...

Summary

Installation and Operation

Placement Guidelines

Guidelines for positioning the power pack unit for optimal airflow and operation.

Installation Steps for MMPP4301-EP

Step-by-step instructions for installing the MMPP4301-EP model unit.

Maintenance

Changing Glycol Pump

Changing Glycol Pump (MMPP4301-EP)

Procedure for replacing the glycol pump on the MMPP4301-EP model.

Changing Glycol Pump (Various Models)

Procedure for replacing the glycol pump on various MMPP models.

Replacing Motor

Replacing Thermostat in All Units

Rewiring a Danfoss Thermostat into a Control Box with a Dixell Thermostat

Troubleshooting

Typical Spare Parts

Wiring Diagrams

Wiring Diagram: MMPP4301-EP

Electrical wiring diagram for the MMPP4301-EP model.

Wiring Diagram: MMPP4301

Electrical wiring diagram for the MMPP4301 model.

Wiring Diagram: MMPP4301-PKG

Electrical wiring diagram for the MMPP4301-PKG model.

Wiring Diagram: MMPP4302

Electrical wiring diagram for the MMPP4302 model.

Wiring Diagram: MMPP4302-PKG

Electrical wiring diagram for the MMPP4302-PKG model.

Wiring Diagram: MMPP4303-PKG

Electrical wiring diagram for the MMPP4303-PKG model.

Wiring Diagram: MMPP4303-PKG-3

Electrical wiring diagram for the MMPP4303-PKG-3 model.

Wiring Diagram: MMPP4305-PKG

Electrical wiring diagram for the MMPP4305-PKG model.

Wiring Diagram: MMPP4305-PKG-3

Electrical wiring diagram for the MMPP4305-PKG-3 model.

Wiring Diagram: MMPP4307-PKG

Electrical wiring diagram for the MMPP4307-PKG model.

Wiring Diagram: MMPP4307-PKG-3

Electrical wiring diagram for the MMPP4307-PKG-3 model.

Wiring Diagram: MMPP4307-PKG-4

Electrical wiring diagram for the MMPP4307-PKG-4 model.

Warranty

Micro Matic MMPP4301-EP Specifications

General IconGeneral
BrandMicro Matic
ModelMMPP4301-EP
CategoryPower Pack
LanguageEnglish

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