The Diagnostics Feature
Chapter Eleven: Troubleshooting
294
Code 4: Check all Keys
1. Press the [4/4] key and then the [
ENTER
] key.
The system should respond by clearing the window and showing the number four (4) in
the right display. All keys on the keypad can now be tested. To test a key simply press
it. For example, if the [1/1] key is pressed, the number 1 appears in the main display.
If the [2/2] key is pressed, the number 2 appears in the main display. The following
chart lists what is shown in the main display for every key on the keypad. Figures 87
and 88 provide examples of some keypad test results.
To Exit Code 4
1. Press the [
] and [
] keys simultaneously.
The system responds by returning to the initial diagnostics screen display.
Diagnostics Code 4 Key Test Results
Key Pressed
What Appears in the Main Display
[the number keys]
[1/1] through [0/D]
The corresponding number
For example, pressing the [1/1] key displays the number 1, pressing
the [0/D] key displays the number 0.
The word UP
The abbreviation dn (for down)
[+/-]
The word SIGn (as shown in Figure 87, page 295)
[
ZERO
/
EXP
]
The abbreviation EP (for exponent)
[
SPAN
/.]
Three decimal points ...
[
DEGAS
/
SET POINT
]
The abbreviation SP (for set point)
[
ON
/
LEAD
]
The word on
[
OFF
/
GAIN
]
The word oFF
[
QUIET
/
CANCEL
]
The word SHHH (as shown in Figure 88, page 295)
[
DISPLAY MODE
]
The abbreviation dISP (for Display mode)
[
CONTROL MODE
]
The abbreviation cont (for Control mode)
[
ENTER
]
The abbreviation Ent (for enter)
Table 87: Diagnostics Code 4 Key Press Results
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