Micro Matic MMPP4302-PKG - TROUBLESHOOTING

TROUBLESHOOTING
TROUBLE CAUSE SOLUTION
1. Excessive foam A.
Warm walk-in cooler
A.
Adjust cooler temperature to 36° to 38° F
(useaqualitythermometer)
B.
Check applied pressure to keg
B.
Adjustsettingonregulatorforproperowrateof
C. Checkequipment C. Checkthephysicalequipmentfromkegtofaucet
D. Warm product lines D. Refer to #5
2.
A. Compressor relay or capacitor
malfunction
A. Replace compressor relay or capacitor
B. Inadequatevoltage B. Measure voltage across common and run terminal
on compressor. Voltage must not drop below 90%
of rated voltage.
C. Compressor failure C. Replace compressor
Compressor starts
and continues to run
until freeze up and
will not cut off.
A. Thermostat control failure A. Replace thermostat
B. Freon leak B. Repair leak and recharge
4. Compressor does
not run but hums.
A. Inadequatevoltage A. Measure voltage across common and run terminal
on compressor. Voltage must not drop below 90%
of rated voltage.
B. Starting relay malfunction B. Replace starting relay. Be sure to use correct
relay. Failure to use correct relay will cause
compressor failure.
C. Compressor malfunction C. Replace compressor
5. Warm beer A. Defective Pump
(check motor also)
A.
Checkreturnlineinreservoirforliquidow.Replace
pump on 125’, 250’, and 500’ units. Check condition of
key between pump and motor.
B. Defective motor (check pump also) B. Replace motor
C. Refrigeration unit not running
C.
Refer to #2
D.
Trunk lines located in
overheated area
D.
Remove from any hot water pipes or kitchen area with
stove or glass washer.
E.
Trunklinesoodedin
PVC chase.
E.
Remove lines from PVC, thoroughly dry PVC and repair or
replace trunk line as needed.
F. Uninsulated or poorly
insulated lines
F.
All lines should be fully insulated from cooler into
dispenser. Includes glycol lines from power pack into
cooler.
G. Thermostat
G. Adjust temperature to colder setting.
H. Condenser fan motor not working
H. Replace condenser fan motor
I. Freon Leak
I.
Repair leak and recharge
J. Dirty condenser
J.
Clean the condenser
K. Condensation inside trunk line
insulation (may be caused from
cleaning lines)
K. Check trunk housing in areas for drooping or low spots,
split insulation approximately 5" and separate. Allow any
water to drain, then air dry the seal closed.
Compressor does
not start (no hum),
but the fan
motor runs.
MICROMATIC.COM | 866-327-4159 POWER PACK SERVICE MANUAL | 13
two (2) ounces per second.