Hytek ALPHA Technical Data Manual page 16

ERRORS
If an error occurs ERROR, followed by a brief description is shown on the
lower display. The errors are classified as follows:
FLOW TOO FAST The pulser has run too fast (in excess of 300 pulses
UNAUTH FLOW
CALIBRATE FAIL A time delay of 2 minutes or more has occurred
PULSER SIGNAL One of the pulse transmitter's pulse trains has been
PULSE REVERSE The meter has run backwards during a delivery
PULSER POWER The pulser has been disconnected
The error condition is maintained until the nozzle is returned to its holster,
for at least 2 seconds, and then removed again to restart the fuelling
sequence.
TIMEOUT
If, during a delivery, no fuel is dispensed for 2 minutes the display will
show TIMEOUT alternating with REPLACE NOZZLE and the pump will
stop running until the nozzle is returned to its holster, for at least 2
seconds, and then removed again to restart the fuelling sequence.
DISPLAY CONNECTION DIAGRAM
NEUTRAL
220/240 VAC
POWER EARTH
INPUT
LIVE
220/240 VAC
NEUTRAL - GREY
MOTOR RELAY
LIVE - BLACK
OUTPUT
per second)
The meter has turned without the nozzle being
removed
during the 20 litre calibration.
interrupted.
AC INPUT
PUMP
NOZZLE P/OUT
GND IN 12V COM REED OPT 12V
1 2 3 1 2 3
12V DC SOL.
NOZZLE 10:1 /
SWITCH 100:1
(WEIGHTS &
INPUT PULSE
MEASURES
OUTPUT
DISPLAY /
CALCULATOR
VIEWED FROM
REAR
SWITCHES
SOLENOID
TANK LEAK EXT
GND
GND SW GND SW GND SW
1 2 1 2 3 4 5 6
TRANSMITTER
OUTPUT
VERSION
ONLY)
PULSE IN COMMS
+12V CH1 CH2 GND
GND + -
DC
1 2 3 4 1 2 3
PULSE
INPUT
CALIBRATION
BUTTON
S858/4