Operation and Service Manual

32 Tempo Undercounter Ice Machine Bin
Troubleshooting - Extended
Specic Errors and Issues
The advanced diagnostic capabilities of the electronic controls utilized on the 1, 3, and 5 Class units allow for easy
and thorough troubleshooting.
Navigation of the control is the key and is explained in the CONTROL OPERATION section of the manual,
along with control button layout, control function descriptions, a service mode menu and service menu selection
explanations.
Verication of temperature and thermistor performance can be identied by directly viewing thermistor readings in
the service mode.
Component failure issues can be identied through service mode menu #20, “Component Testing.” Individual
components can be switched on and off to check for both proper function of a specic component and also
delivery of supply voltage to the components through the relays and DC outputs located on the relay/power board.
Normal Operating Sounds
All models incorporate rigid foam insulated cabinets to provide high thermal efficiency and maximum sound
reduction for its internal working components. Despite this technology, your model may make sounds that are
unfamiliar.
Normal operating sounds may be more noticeable because of the unit’s environment. Hard surfaces such as
cabinets, wood, vinyl or tiled oors and paneled walls have a tendency to reect normal appliance operating
noises.
Listed below are common refrigeration components with a brief description of the normal sounds they make.
NOTE: Your product may not contain all the components listed.
§ Compressor: The compressor makes a hum or pulsing sound that may be heard when it operates.
§ Evaporator: Refrigerant owing through an evaporator may sound like boiling liquid.
§ Condenser Fan: Air moving through a condenser may be heard.
§ Water Valve: Running water and clicking as valve opens and closes.
§ Ice Dropping: Ice falling into the bin makes a dull thud sound. The sound decreases as the bin lls with ice.
§ Solenoid Valves: An occasional clicking sound may be heard as solenoid valves are operated.
Main Control
The main control board is very robust and is rarely the cause of system issues. It is important to fully diagnose
the board for any suspected failures before attempting to remove the board for replacement or service. Follow the
guidelines below to fully test and diagnose the main control.
LED
Readout
Sub
Menu
Function Change
Settings
Press Light button to
Toggle Component
ON/OFF
Comments
21 Model # X X We sell model 57 ???
22 User Interface (lights all segments) X X Review all segments in
display are lite
23 Activate Defrost/Harvest Not Used
24 Factory Default X X Press and hold light
button for 3 sec to restore
all values to factory
default
25 Main Software (Display ONLY) Not Used
26 Live Log Period Not Used Frequency that data is
outputted to diagnostics
port
27 Factory Test Mode X X 0=OFF, 1=ON (Will see
FT in display and must
exit this mode when
nished)
28 Compressor RPM Not Used Default 04
29 Freeze Time Adjust (Model 54 ONLY) Not Used
30 Harvest Time Adjust (Model 54 ONLY) Not Used
31 Low Temp Alarm Limit (Model 55 ONLY) Not Used 36 degrees F
32 High Temp Alarm Limit (Model 55 ONLY) Not Used 46 degrees F