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John Wood SERIES 100 User Manual

Page 17

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17

4. Changing the Display Units

The display interface to the heater has the option of selecting between de-

grees 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 Set-

tings" 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:

5. Fault and Warning 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 Warnings and Faults:

Warnings: 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 a Warning:

• 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 condi-

tion is corrected and, in most cases, power has been cycled.

Example of a Fault:

Advanced Diagnostics Information

When a fault or warning 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 equiva-

lent to that of a licensed tradesmen in the field involved.

6. Access to the Current Fault or Warning

When a fault or warning 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 warning by pressing the Back key, you can always

return to the fault screen through the menu.

This manual is related to the following products: