GE E4H Series Operation And Maintenance Manual page 28

Symptom (Alarm)
Conductivity drifts or
changes after
calibration
Water meters are not
accumulating
"Node Not Responding"
error message
Display is blank
pH reading is off by
more than one pH unit
Relays don't turn
ON/OFF during normal
operation
Chemical pump will not
feed chemical.
Chemical pump feed
reverse of what you
expected.
E4H Series
Operation & Maintenance Manual
TROUBLESHOOTING GUIDE
Possible Cause
Calibration may have
been done before the
reading stabilized. The
staple line may contain
electrical noise.
May be a wiring
problem.
The K factor is
improperly configured.
Turbine meter not
spinning.
This message occurs
when one circuit board
can not communicate
with another board.
Monitor not powered.
Probe calibrated using
span or the pH probe is
bad.
Relays may be affected
by other software
variables.
Pumping may be
affected by other
software variables.
Relay setpoint not
properly configured.
Remedies
When calibrating, wait at least 15
seconds to 1.5 minutes for reading
to stabilize. To reduce electrical
noise, use grounded metal fittings
on the inlet and outlet of the
monitor plumbing.
Check wiring.
Reconfigure K factor.
Check meter for spin.
Check that all boards are mounted
correctly and that all connectors are
fully mated. The monitor may not
have the option board that is trying
to be accessed. The board that is
trying to be accessed may not be
working.
Open the front panel. Look at the
yellow LEDs on the rear power
board. Are they on? If yes, check
ribbon cable. Is it properly seated?
If no, does the unit have power.
Reinitialize calibration. Recalibrate
pH using zero only. Replace pH
sensor.
Is the relay manually turned on or
off? Is the CIP input activated? You
must have permeate or concentrate
flow for a relay configured as
setpoint to function.
Is the relay manually turned on or
off? Is the CIP input activated? You
must have permeate or concentrate
flow for a relay configured as
setpoint to function and trigger
pump operation.
Determine whether you need the
relay configured for direct or reverse
setpoint feed.
28