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Fail To
Start Test
If the fail to start test is activated
(using the option switches on the
bottom of the controller), then the
follow sequence is used each time
a pump is called:
1. When a pump is called a timer
is started.
2. After a start-up time has
expired (set by switch 6), the
pump running input is checked.
If the pump is not running
at the end of the time, then a
pump fail to start condition is
set and the pump is disabled.
The pump will remain disabled
until the reset button is pushed
or until the external reset input
is activated.
Alarm Relay
Outputs
The controller has two relays for
level alarm. Option switch 5 can
be used to cause these relays to
cycle on and off. This is useful to
provide blinking on the external
alarm lights.
Auxiliary
Relay
There is one relay that can have
either of two functions selected by
option switch 4:
1. If the horn option is selected,
then this relay can be used to
drive an external horn or bell.
Whenever either a high or
low alarm condition starts, the
relay is activated (closed). If
the alarm condition is cleared,
then the relay is also cleared.
6
If the reset button is pushed or
the external reset/mute input is
activated, then the horn relay
is cleared. If the horn is muted,
then it will not reactivate until
the alarm condition is cleared
and another starts.
2. If the common alarm option
is selected, then this relay will
be activated when any of the
following conditions exist:
• High alarm
• Low alarm
• Pump temperature failure
• Pump disabled by fail to
start test
This common alarm condition can
be used to drive an alarm light,
telephone dialer, or telemetry
system.
Option
Switches
There are six switches on the back
of the controller which select
several different options.
SW1 – When this switch is set, the
fail to start test is enabled.
SW2 – When this switch is set,
the temperature fail condition is
latched up until reset.
SW3 – When this switch is set, the
seal fail input is inverted (open is
fault).
SW4 – When this switch is set, the
aux relay is the common alarm. If
it is not set, then the aux relay is
the horn output.
SW5 – When this switch is set,
the low and high alarm relays will
cycle, causing a lamp blink.
SW6 – When this switch is set, the
time between pump starts and the
delay for the fail to start test is 12
seconds instead of 6 seconds.
Fault
Outputs
There are seven fault lamps with
corresponding driver outputs. They
are used to display the following
fault conditions:
1. Floats out of order
2. Pump 1 seal fail
3. Pump 2 seal fail
4. Pump 1 temperature fail
5. Pump 2 temperature fail
6. Pump 1 disabled
7. Pump 2 disabled
Each of these has a corresponding
relay drive output. These outputs
are designed to drive the coil of
a 12VDC relay external to the
controller. A source of 12VDC
is also provided. To use these
outputs, one side of the relay coil
is connected to 12VDC and the
other coil connection is connected
to the driver output.
Specifications
Float and Sensor Inputs
There are five float inputs; two seal
fail sensor inputs, two temperature
fail inputs, and two disable inputs.
They use current limiting resistors,
filter capacitors and Zener diodes
for transient protection. They also
have both hardware and software
filters on these inputs to improve
immunity from noise. They have
the following specifications:
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