John Wood Envirosense Power Direct Vent (prior to May 2010) - Manual (Page 33)

33
3. changing the display units
The display interface to the heater has the option of selecting between
degrees Fahrenheit and degrees Celsius for temperature displays.
This can be found in the “Display Settings” menu. Also in this menu,
you may adjust how the backlight operates and the contrast of the
LCD screen.
actIon:
From the Main Menu, press the Down button to highlight "Display
Settings" then press Select.
dIsplaY:
actIon:
Use the UP and DOWN buttons to highlight the desired setting. Then
press Change. Again, use the UP and DOWN buttons to scroll through
the options for that setting.
dIsplaY:
actIon:
Press update to accept the change or cancel to reject it.
dIsplaY:
4. fault and alert conditions
This water heater is equipped with electronic controls that have the
ability to monitor almost all aspects of the water heater operation. In
the case that there is an undesirable or unsafe condition that occurs,
the water heater controls will detect this condition and determine the
appropriate action. Part of this is displaying the information on the LCD
in plain text that accurately describes the condition and diagnostics
information that can be used to correct the issue.
There are two types of conditions that can occur during operation. These
are Alerts and Faults:
•
alerts: This is a non-safety related condition that the control has detected
that may cause the water heater to operate in a less than optimal condition,
but does not pose a safety concern.
note: When these conditions occur, continued heating cycles will
continue and the heater will attempt to regulate the water in the tank to
the Operating Set Point.
example of an alert:
• Faults: This is a safety related condition that has been detected
by the heater.
NOTE: When these conditions occur, the water heater will not
continue any further heating cycles and the water will no longer be
heated until the condition is corrected and, in most cases, power has
been cycled.
example of a fault:
advanced diagnostics Information
When a fault or alert has been declared, advanced information can be found
in the control. By pressing the Advanced button, detailed information can
be found regarding diagnosing and resolving the problem.
warnInG: usage of the advanced information requires ability
equivalent to that of a licensed tradesmen in the field involved.
5. access to the current fault or alert
When a fault or alert has been detected by the control, it will automatically
be displayed on the screen and the back light will blink. If you choose to
leave the current fault or alert by pressing the Back key, you can always
return to the fault screen through the menu.