Hoffman Media EDD-4C Manual Do Utilizador
23
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)
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
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
display
• Changing the mode toggle
switch (item 8 in Figure 6 on
page 13).
page 13).
• Ignore.
You want to quickly stabilize the
Dripmaster for a new drip rate
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.
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.
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.
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.
the system; the drip rate is much
higher or lower than expected.
• Circuit failure
• Set the Mode switch to MAN,