User Guide & Service Manual

USER GUIDE
Troubleshooting - Extended 2
u-line.com
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE • SERVICE
REFRIGERATION SYSTEM DIAGNOSIS GUIDE
ERRORS
*All errors are logged in memory.
*Only door error is displayed on the display and has an
audible signal.
*For clear ice models, pump error is displayed via alert
light with no audible alerts.
E1:Thermistor 1 open. Refrigerator Zone.
E2:Thermistor 2 open. Evaporator.
E3:Thermistor 3 open Freezer Zone.
E4:Thermistor 4 open Ice Maker.
E5:Thermistor 1 shorted. Refrigerator Zone.
E6:Thermistor 2 shorted. Evaporator.
E7:Thermistor 3 shorted.Freezer Evaporator.
E8:Thermistor 4 shorted. Ice Maker
E9:Door open error.
Pi:Pump Circuit open (Does not apply to this model).
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.
Power Fault
If the unit does not (or seems to not) power on, follow the
flow chart below to help diagnose the issue. Before
beginning it is important to first verify the unit is not
simply set to sabbath mode.
System
Condition
Suction
Pressure
Suction
Line
Compressor
Discharge
Condenser Capillary
Tube
Evaporator Wattage
Normal Normal Slightly below
room
temperature
Very hot Very hot Warm Cold Normal
Overcharge Higher than
normal
Very cold -
may frost
heavily
Slightly warm
to hot
Hot to warm Cool Cold Higher than
normal
Undercharge Lower than
normal
Warm -
near room
temperature
Hot Warm Warm Extremely cold
near inlet -
outlet below
room
temperature
Lower than
normal
Partial
Restriction
Somewhat
lower than
normal -
in vacuum
Warm -
near room
temperature
Very hot Top passes warm
lower passes
cool (near room
temperature due
to liquid
Room
temperature
(cool) or colder
Extremely cold
near inlet -
outlet below
room
temperature
backing up
Lower than
normal
Complete
Restriction
In deep
vacuum
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
Room
temperature
(cool)
No refrigeration Lower than
normal
No Gas 0 PSIG to 25" Room
temperature
(cool)
Cool to hot Room
temperature
(cool)
Room
temperature
(cool)
No refrigeration Lower than
normal
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