A.O. Smith Boiler VB/VW- 1000 User Manual

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• UpandDownKeys:
These keys are used to move upwards and downwards in
screens to reach a desired item and to change setpoints
and user settings. They have an auto increment/decrement
feature for some of the configurations and values. When
you first press one of the keys and value changes by 1
count, then wait 1/2 second and changes slowly until the
key is released or if held for 3 or more seconds it will
change the value quickly.
• HelpKey:
Pressing the Help key from any screen displays helpful
information about that screen. From the menu screen,
general help information is displayed as to how to use the user
interface. To return to the previous screen press the Help or
Select keys, or press Menu key to go to the menu screen. If a
small down arrow appears in the lower right hand corner then
there is off screen content below what is displayed. Press the
down arrow to scroll down to this information. After scrolling
down an up arrow will appear in the upper right hand corner
to indicate off screen content above what is displayed.
UIM LED’s
The three LED’s to the right of the LCD indicate the status
of the overall system. The red LED indicates that a fault
has been detected and the system has stopped running.
It is on continuously for soft faults and flashes for hard
faults. The Yellow LED indicates that the boiler is in a
ready mode waiting for a call for heat command. When
on continuously the Green LED indicates that the system
is in the heating mode. If it is flashing it indicates that the
UIM is in the initialization mode and the touch switches are
being calibrated.
The VF
®
boiler has a display on the UIM which is a scaled display
indicatingthecurrentringrateoftheboiler(25%to100%).
Fault Messages and Troubleshooting Guide
The EMC 5000 modulation system does excessive self-
diagnostics and displays detected faults on the UIM display
in an easy to read manner. There are approximately 80
different faults that can be detected. Some of the faults are
caused by internal problems and some by external causes.
Thefaultscreatedifferenttypesofsystemlockouts(shut
down).Hardlockoutsareseriousproblemsthatrequirethe
user to manually restart the system. Soft lockouts can be reset
by the user or after 60 minutes the system will automatically
clear the error and restart. Auto Reset lockouts will monitor
the cause of the fault and it the fault clears itself the system
resets itself. The following table shows the fault messages
and some possible troubleshooting hints:

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