Section 6
Before Requesting Service
6-1
Section 6
Before Requesting Service
Troubleshooting Guide
Before requesting any service on your Manitowoc
cabinet, please check the following points.
This guide is not comprehensive; it is intended as a
reference for solutions to common problems.
WARNING
Disconnect electric power before performing any
service.
Symptom
Possible Cause
Corrective Action
Cabinet not running
Fuse blown or circuit breaker tripped.
Replace fuse or reset circuit breaker.
Power cord unplugged.
Plug in power cord.
Thermostat set too high.
Set thermostat to lower temperature.
Main power switch turned off.
Turn main power switch on.
Cabinet in defrost cycle. (Freezer models) Wait for defrost cycle to finish.
Condensing unit runs
for long periods or
Excessive amount of warm product
placed in cabinet.
Allow adequate time for product to cool
down.
continuously
Prolonged door openings or door(s) ajar.
Make sure door(s) are closed when not in
use. Avoid prolonged door openings.
Door gasket(s) not sealing properly.
Check gasket condition. Adjust door or
replace gasket if necessary.
Dirty condenser coil.
Clean the condenser coil.
Evaporator coil iced over.
Turn unit off and allow coil to defrost.
Make sure thermostat is not set too cold.
Also, check gasket condition.
Cabinet temperature
Thermostat set too high.
Set thermostat to lower temperature.
is too high
Poor air circulation in cabinet.
Re-arrange product to allow proper air
circulation.
Exterior thermometer is out of calibration.
Re-calibrate thermometer.
Excessive amount of warm product
placed in cabinet.
Allow adequate time for product to cool
down.
Prolonged door openings or door(s) ajar.
Make sure door(s) are closed when not in
use. Avoid prolonged door openings.
Dirty condenser coil.
Clean the condenser coil.
Evaporator coil iced over.
Turn unit off and allow coil to defrost.
Make sure thermostat is not set too cold.
Also, check gasket condition.
Cabinet is noisy
Loose part(s).
Locate and tighten loose part(s).
Tubing vibration.
Insure tubing is free from contact with
other tubing or components.
Refrigerator is freezing
product
Thermostat is set too low.
Set thermostat to higher temperature.
Compressor will not
Dirty condenser coil.
Clean the condenser coil.
start - hums and trips
on overload
protector
Not enough cabinet clearance for
proper refrigeration system operation.
Move cabinet or make other
adjustments to gain proper cabinet
clearances.
Low voltage to cabinet.
Check and correct incoming voltage to
cabinet.
