Entering Diagnostic Mode
Diagnostic mode is entered by removing the Cover
Screw and O-ring on the right-hand side of the Digital
Display Control Module (See Figure 14-1) using a 3/32''
Allen wrench. Once the screw is removed, press and
release the button located under the screw. The word
HELLO
will appear on the display.
Exit from diagnostic mode is accomplished by pressing
and releasing the switch again. The word
HYPRO
will
appear on the display followed by a zero after several
seconds.
Replace the Cover Screw and O-ring when
done.
NOTE: Always replace the Cover Screw and O-ring
to keep water and dirt from entering the Digital
Display Control Module as it may cause serious
damage to the components.
The system will provide a full complement of diagnostic
functions to enable verification of all sub-systems. See
electrical diagram in Figure 14-2.
Diagnostic Mode Functions
On entry to diagnostic mode, the display will be
illuminated.
SELECT
will select the various modes, each
indicated by the status indicator light by the label. These
diagnostic modes include:
None
Pressing down will illuminate all display segments and
status indicator lights.
Flow
The value shown is the current number of flow pulses
being received each second. If no water is flowing, the
value should be zero. This is a function test for the
flowmeter. Removing the flowmeter sensor from its tee
and spinning the paddlewheel should produce a reading
other than zero on the display.
Total Water
The value shown reflects the level of the liquid foam
concentrate in the tank.
Lo.Con
indicates that the tank is empty.
Hi.Con
indicates a satisfactory level for operation. This
is a test of the low-tank level sensor and wiring.
% (Percent)
The value shown reflects the duty cycle to run the foam
pumps. When diagnostic mode is first entered, the duty
cycle will be for the electric motor-driven foam pump. If
FOAM
is pressed, the electric motor-driven foam pump
will run at the selected rate and the
ON
status indicator
lamp will be illuminated. The value may be altered
with UP or DOWN. This is a test of the electric
motor-driven foam pump driver box and pump hook-up.
Depressing the down button will increase pump
speed which should be audible and visible on the
TOTAL FOAM
display.
Total Foam
The value shown is the current number of foam
flowmeter pulses being received each second. If the
foam pump is not running, the value should be zero.
Increasing motor speed in
%
mode should increase the
displayed value. This is a test of the foam flowmeter
sensor and wiring of the hydraulic motor-driven foam
pump.
Depressing the
FOAM
button will start the hydraulic
motor-driven foam pump. By pressing down or up, the
display will show the duty cycle at which the pump is
running. The duty cycle value can be changed by
pressing and holding the up or down, and the speed of
the hydraulic motor-driven foam pump should change
accordingly. When the down or up button is released,
the display will show the value at which the hydraulic
motor-driven foam pump is turning.
44
Installation and Operation Manual
14
Troubleshooting
Figure 14-1
Diagnostic Switch Location
HELLO
Cover Screw
To Be Removed
