U-Line 1224R User Manual page 42

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
REFRIGERATION SYSTEM DIAGNOSIS GUIDE
System Suction
Condition Pressure
Normal Normal
Overcharge Higher than
normal
Undercharge Lower than
normal
Partial Somewhat
Restriction lower than
normal -
in vacuum
Complete In deep
Restriction vacuum
No Gas 0 PSIG to 25"
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.
E2:Thermistor 2 open (Does not apply to this model).
E3:Thermistor 3 open (Does not apply to this model).
E4:Thermistor 4 open (Does not apply to this model).
E5:Thermistor 1 shorted.
E6:Thermistor 2 shorted (Does not apply to this model).
E7:Thermistor 3 shorted (Does not apply to this model).
E8:Thermistor 4 shorted (Does not apply to this model).
E9:Door open error.
Pi:Pump Circuit open (Does not apply to this model).
Suction Compressor
Line Discharge
Slightly below room Very hot
temperature
Very cold - Slightly warm
may frost heavily to hot
Warm - Hot
near room
temperature
Warm - Very hot
near room
temperature
Room temperature Room
(cool) temperature
(cool)
Room temperature Cool to hot
(cool)
Condenser Capillary
Tube
Very hot Warm
Hot to warm Cool
Warm Warm
Top passes Room
warm lower temperature
passes cool (cool) or colder
(near room
temperature
due to liquid
Room Room
temperature temperature
(cool) (cool)
Room Room
temperature temperature
(cool) (cool)
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.
u-line.com
SERVICE
Evaporator Wattage
Cold Normal
Cold Higher than
normal
Extremely cold Lower than
near inlet - normal
outlet below
room
temperature
Extremely cold Lower than
near inlet - normal
outlet below
room
temperature
backing up
No refrigeration Lower than
normal
No refrigeration Lower than
normal
Troubleshooting - Extended 2