Troubleshooting; Before Calling For Service Checklist - Manitowoc 820C Serie Manual De Instalación, Operación Y Mantenimiento

Before Calling for Service Checklist

If a problem arises during operation of your ice machine, follow the checklist below before calling service. Routine adjustments
and maintenance procedures are not covered by the warranty.
Problem
Ice machine does not operate.
Ice machine stops, and can be restarted
by pressing the power switch.
Ice machine does not release ice or is
slow to harvest.
Ice machine does not cycle into harvest
mode.
Ice quality is poor (soft or not clear).
Part Number: 000013325 Rev 02 6/17
Section 5

Troubleshooting

Possible Cause
No electrical power to the ice machine and/or
condensing unit.
High pressure cutout tripping.
Energy Saver or other field entered
programming is stopping ice machine.
Water curtain off or stuck open.
Ice machine is not turned on.
IB Models Only - Dispenser level thermostat is
open.
Safety limit feature stopping the ice machine.
Ice machine is dirty.
Ice machine is not level.
Low air temperature around ice machine head
section.
Fan cycle control does not de-energize
condenser fan motor.
Water regulating valve incorrectly adjusted or
will not close.
The six-minute freeze time lock-in has not
expired yet.
Ice thickness probe is dirty.
Ice thickness probe is disconnected.
Ice thickness probe is out of adjustment.
Uneven ice fill (thin at the top of evaporator).
Poor incoming water quality.
Water filtration is poor.
Ice machine is dirty.
Water dump valve is not working.
Water softener is working improperly (if
applicable).
To Correct
Replace the fuse/reset the breaker/turn on the
main switch.
Clean condenser coil. (See page 44)
Reset to factory defaults. (See page 35)
Water curtain must be installed and swinging
freely.
Press power button, display must indicate
"Making Ice".
Adjust thermostat to maintain correct dispenser
level.
Refer to "Safety Limit Feature" on the next
page.
Clean and sanitize the ice machine. (See page
40)
Level the ice machine.
Air temperature must be at least 2°C.
Call for service.
Check for water at condenser drain outlet
in harvest cycle. Contact a qualified service
company to adjust/replace valve if water is
present.
Wait for the freeze lock-in to expire.
Clean and sanitize the ice machine. (See page
40)
Connect the probe to the control board.
Adjust the ice thickness probe. (See page 26)
Verify sufficient water level in sump trough.
Contact a qualified service company to check
refrigeration system.
Contact a qualified service company to test
the quality of the incoming water and make
appropriate filter recommendations.
Replace the filter.
Clean and sanitize the ice machine. (See page
40)
Disassemble and clean the water dump valve.
Repair the water softener.
45