HALE SmartFOAM 1.7AHP, Description, Installation And Operation Manual

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Page 82
SmartFOAM
TROUBLESHOOTING
USER DIAGNOSTICS
Diagnostic LED indicators are provided on the distribution
box and on the feedback sensor. The LED on the feedback
sensor flashes when the sensor is receiving pulses from the
flow sensor rotor targets. These LEDs help to ease tracing of
power supply faults and eliminates some of the guesswork
in troubleshooting. If the system malfunctions make sure the
following conditions are checked:
❑
All hose connections are correct and tight (Refer to
appropriate system plumbing diagram in the
INSTALLATION section).
❑
All electrical connections are correct and tight (Refer
to appropriate system electrical diagram in the
INSTALLATION section).
❑
Apparatus electrical system energized with power
supplied to pump panel and Hale SmartFOAM
controller.
Once the above conditions are met, proceed to the system
troubleshooting section to determine the cause of the
malfunction.
Hale SmartFOAM systems consist of individual subsystems
working together to provide finished foam solution at the
proper percentage. Also see the SYSTEM OVERVIEW
section.
The system is designed using modular components making
troubleshooting and repair easier. Each subsystem has its
own set of troubleshooting procedures. The procedures that
follow provide a logical flow path to isolate and correct a
system failure.
Note: Hale SmartFOAM system electronic components
have no user serviceable components inside and are
replaced as a unit. Opening of Hale SmartFOAM electronic
components voids the manufacturer warranty.
System Overview
The SmartFOAM proportioner is a closed-loop system. The
“brain” behind the system is the computer-controlled
SmartFOAM Controller Display. A basic understanding of
how the system functions makes troubleshooting easier
(refer to Figure 64
: Closed Loop Control Diagram while
reading the following control steps).
1. Water flows through the discharge manifold and past
the water flow sensor spinning its paddlewheel.
2. The water flow sensor sends the raw digital pulses
to the SmartFOAM controller display.
3. The SmartFOAM controller display calculates the
desired foam flow rate based on the water flow rate
and the currently set foam concentrate percentage.
The SmartFOAM controller display transmits a
requested motor rate (0% to 100%) to the
distribution box via CAN communication.
4. The distribution box sends pulse-width-modulated
control voltage (0% to 100%) to the motor which
turns the pump at the desired speed.
5. The pump begins discharging foam concentrate into
the discharge manifold where it mixes with the
water.
6. The foam sensor detects the foam concentrate
flowing past the target rotors and sends the raw
digital pulses to the distribution box.
7. The distribution box sends the foam flow rate to the
SmartFOAM controller display where it is evaluated
and the process starts again at step 1.
Figure 64 : Closed Loop Control Diagram
Note: The SmartFOAM system has a simulated flow
function described in the SIMULATED FLOW OPERATION
section. This allows troubleshooting without flowing water
yet simulates an actual water flow.