Milnor C4A, Manual, Page: 24 / 36

Ê How To Test the Displays
C4A models are equipped with a Test button beneath the Run/Test keyswitch, as shown in FIGURE 2. Press
this button once to begin testing the light emitting diode (LED) displays. All five digits will simultaneously display
“1,” then “2,” etc., counting upward then repeating the
sequence. All digits should be identical at any time.
Press Test to end the Display Test and start the Input
Test.
Ê How To Test the
Microprocessor Inputs
D u r in g t h i s te s t e ac h in p ut s ig n al to th e
microprocessor lights a specific segment of the Time
Remaining display (s ee Figure 3 and Table of
Microprocessor Inputs in this section).
In Test mode with the input test active, the
Deposit Coins display is dark except for two flashing
decimal points (DP1 and DP2). Likewise, the Machine
Status display is dark except for the flashing decimal.
If no inputs other than Test Mode are made, the Time Remaining
display appears as shown in Figure 3 immediately upon beginning the
input test sequence. Segment A2 corresponds to Test Mode; when this
segment lit, the machine is functioning normally in Test mode. Other
segments of the display represent other microprocessor inputs, as listed
in the Table of Microprocessor Inputs in this section. Manually actuate
each input for testing, and verify that the corresponding segment of the
Time Remaining display illuminates.
Segment A1 (OFF) represents the status of the Test button. Be-
cause the Test button scrolls the control through the available tests,
pressing it after the input test is selected will advance the control to the
output test without lighting segment A1. Assume that the Test button is
operating correctly if the control switched from the display test to the
input test when the Test button was pressed.
Alternatively, press and HOLD the Test button while in the dis-
play test. Segment A1 will remain illuminated as long as the Test button
is held.
Î FIGURE 2
(MSTS0501AE)
Î Testing Controls—C4A Models
Î FIGURE 3
(MSTS0501AE)
Î Time Remaining Display
(Input Test Mode)
TESTING DISPLAY, INPUTS, AND OUTPUTS
ON THE ELECTRONIC COIN WASHER-EXTRACTOR
MSTS0501AE/9274AV (3 of 5)