U-Line 1224RF User Manual & Service Manual page 45

USER GUIDE
SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE •
Check Voltage
No Voltage
At Wall Outlet
Vol tage
Verif y V olta ge At
No Voltage
Ma in Con trol
Vol tag e I nput
Vol tage
Che ck Fus e F1
No Continuity
For Co ntin uity
C ont inui ty
C onnec t T est Displ ay
C y cle Po we r A nd Ch ec k
For Op era tion
Not Op era ting
Is th e R eed
Swit ch Ope rating
P rop erl y?
No
Replace
Reed Switch
Testing The Main Control
If the main control is suspected of being faulty, the
following procedure should be performed to verify
main control for functionality.
Relay & DC Outputs
One of the primary functions of the main control is to
operate the multiple relay and DC outputs during
each cycle. Verify proper operation of these relays
using the following procedure.
1. Enter "Relay Toggle" through the service menu.
NOTICE
Frequently toggling the compressor relay could
force the compressor
Alert Customer
Of Power Failure
Replace
Power Cord
Replace
Fuse
Inspect
Operating
Customer UI
and Data Cable
Replace Main
Yes
Board
into overload.
compressor will automatically deactivate during
an overload and will remain deactivated until the
overload switch cools. This could take some time.
It is important to allow the compressor at least 5
minutes off time between relay cycles.
2. Toggle the relay. Its related component should
activate / deactivate with the switching of the
relay. If it does not, test component.
Other Suspected Main Control Faults
If other components have been ruled out as being
faulty but the unit continues to have operating issues,
it is most likely due to a configuration error.
Configuration errors can be cleared by restoring the
unit to its factory default setting. Factory defaults
may be restored through the service menu.
CAUTION
Precautions must be taken while working with
live electrical equipment. Be sure to follow
proper safety procedures while performing tests
on live systems.
REED SWITCH
A reed switch is used to monitor door state. When the
door is closed magnetic force pulls the reed to its
contact and closes the circuit which turns the light and
display off. When the door is open the reed pulls away
from the contact and opens the circuit. If the door is
left open for longer than 5 minutes, the switch will
trigger an error code and set an audible warning.
The
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SERVICE
Troubleshooting - Extended 3