•
NOTE:
Override intervals or pulses are not
ended by scheduled OFF events; they can only
be ended by timing out, by power
interruptions, or by pressing the
ON/OFF
key. At the termination of an override interval
or pulse, the load may be on or off. If the
override interval or pulse was initiated via the
front panel
ON/OFF
key, the load will
normally be off at the end of the override
interval or pulse; the load will remain on only
if an ON set point has occurred during the
override interval or pulse. If the override
interval or pulse was initiated via the remote
override connector, the circuit will revert to its
normally programmed condition at the end of
the override interval or pulse.
• Review
SET UP
or observe the flashing
"Holiday Ref" light to see if timer could be
following a holiday program with no
scheduled activity.
Load Switches
• Using the
REV
function, check program times
at Incorrect
against the times you entered in the chart.
Time
• Review
SET UP
or observe the flashing
“Holiday Ref”” light to see if the timer is
following a holiday schedule. Holiday dates
and schedules from the prior year do not
automatically clear or adjust. They must be
manually revised or removed annually.
• When using pulse or interval On programming
the load will switch On at the scheduled time
and Off at that time, plus the pulse or interval
duration. For “Off” pulses or intervals the load
will switch Off at the scheduled time, and On
at that time plus the pulse or interval duration,
even if the load was not On before the start of
the Off pulse
or interval.
TROUBLESHOOTING
Problem
Solution(s)
Display Does
• Make sure flat cable is properly plugged into the
Not Light
rear of the logic module. Refer to “Re-installing
logic module” in Special Instructions. If connec-
tor will not install easily, check for bent pins.
• On multi-volt model make sure the voltage
selector jumper is correctly installed and that
matching voltage is present at timer power
terminals. On 24V model make sure 24VAC
is present at terminals 1 and 2 or at the two-
place terminal block on the back of the power
module.
Loads Not
• Check wiring. Note the load contacts are
Switching
isolated to allow you to switch loads with a
voltage different than the timer power. You may
have forgotten to add the appropriate connec-
tions required to power the load contacts. See
wiring examples.
• Check to ensure all breakers or disconnects
have been reset.
• Make sure load switches are in
Enable
position
for automatic switching.
• After a power interruption all loads will be Off
and will “catch up” to the present programmed
state as of midnight of the present day.
Schedules that turn On one day, then Off one
or more days later, need a redundant switch On
time at 12:00 A.M. Loads that are operated by
pulses (such as latching contactors) may not be
restored to the expected condition if any On/Off
pulses occurred during the power interruption.
Consider using fixed On/Off schedules in
conjunction with either self-clearing contactors
or contactors adapted for “two wire control”.
See “Load Controls” for details.
• Make sure the
SET/RUN
switch is set to
RUN.
32
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Next Generation
