Hoffman Media DRIPMASTER EDD-4C - Manual (Page 23)

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Section 5: Maintenance and Troubleshooting
Table 4: Routine Maintenance
Task Frequency
Check for oil leaks Monthly
Oil filter change (the oil filter used can be an
automotive fuel filter with ¼" fittings) Every six months
Check for normal operation
• The displayed drip rate is equal to the Normal (pump
on) mode drip rate setting, within a -1, +2 digit
tolerance
Weekly
Table 5: Troubleshooting
Problem Possible Cause Solution
The display and LEDs are not lit. • The unit is not powered. • Check power in the connection
box.
An unusual result appears on the
display • Changing the mode toggle
switch (item 8 in Figure 6 on
page 13).
• Ignore.
You want to quickly stabilize the
Dripmaster for a new drip rate • You just refilled the oil tank.
• You just increased the drip rate
setting in the Normal (pump on)
mode.
• With the Mode toggle switch
(item 2 in Figure 6 on page 13)
in automatic (AUTO), hold
down the Close push button
momentarily to slow down the
drip rate.
• With the Mode toggle switch in
position AUTO, hold down the
Open push button momentarily
to speed up the drip rate.
A suspected fault has occurred in
the system; the drip rate is much
higher or lower than expected. • Circuit failure • Set the Mode switch to MAN,
and set the drip rate manually
using the Open and Close
push buttons. See Figure 6.