Milnor C4A, Manual, Page: 18 / 36

Ê The Power Restoration Sequence
Ë If Machine Memory Is Corrupt
—If the machine loses power while a wash cycle is running and
microprocessor memory is corrupt (current wash cycle is not retained), the machine resets as shown in “The Power
Up Sequence” in this section. The microprocessor memory will remain intact approximately 24 hours without
power.
Ë If Machine Memory Is Intact AND Door Is Closed
—If the machine loses power while a wash cycle
is running, and the wash cycle in progress is retained by the microprocessor, the control checks the status of the door
latch when power is restored. If the control detects that the door is closed, the wash cycle resumes—after an
80-second safety delay—at the beginning of the step in which power was lost. If the control detects that the
door is open, the machine resets as shown in “The Power Up Sequence” in this section.
The drain opens as soon as the machine loses power, but if the power outage is brief, the liquor level may not
fall enough to open the level switch. If the level switch is made when power is restored, the display indicates a Level
Switch Fault (E3) until the liquor level in the cylinder falls enough to open the level switch. When the level switch
opens, the machine clears the error and resumes the wash cycle at the beginning of the step in which power was lost.
If the error does not clear automatically, see “TESTING THE INPUTS, OUTPUTS, AND THE DISPLAY ON THE
C4A ELECTRONIC COIN WASHER-EXTRACTOR.”
If power is lost during extract, the machine executes a recycle sequence shown below when power is restored:
1. Basket rotates clockwise at wash speed for 18.5 seconds.
2. Basket accelerates to distribution speed and maintains speed for 60 seconds.
3. Timer starts and basket accelerates to extract speed. If the interrupted step is a low-speed extract, the wash
cycle proceeds normally. If the interrupted step is a final (high-speed) extract, the machine maintains
low extract speed for 100 seconds, then accelerates to high extract speed.
Ê Accessing the Formula Count Accumulator
Ë Operation
—The Formula Count Accumulator (FIGURE 2) tracks the number of
times the wash cycle has been run. This cumulative counter automatically incre-
ments each time the final extract step begins. The accumulator may be viewed and
compared to previous readings to determine the number of wash cycles, up to 999.
After 999 counts, the accumulator resets to 000 when next incremented.
Because the accumulator is maintained in capacitor-backed memory, a brief
power loss should not affect the count. However, a power loss of more than 24 hours
may cause memory loss, in which case an Accumulator Warning message (E1) ap-
pears on the display to indicate that accumulator memory was corrupted and reset to
0. Clear this error as described in “Viewing and Clearing Counter” in this section.
Ë Viewing and Clearing Accumulator
—The accumulator may be viewed only when a wash cycle is not
in progress and the machine is not in Attendant mode. To view the counter, open the door and turn the keyswitch to
“Attendant.”
To clear the accumulator or an accumulator error, open the door, turn the keyswitch to “Attendant” and press
OVERSUDS three times. The accumulator displays “000” until a wash cycle is run. Always check accumulator if
power has been off for several days.
Î FIGURE 2
(MSOP0502AE)
Î Accumulator Display
OPERATION OF C4A ELECTRONIC COIN WASHER-EXTRACTOR MSOP0502AE/9274AV (3 of 3)