18
B20352 ECN-12354
Trouble-Shooting
SYMPTOMS
PROBABLE
CAUSE
REMEDY
OR
CHECK
Electrical System (continued)
Red indicator light does not come
LED defective
Replace manifold controller PCB.
on when one bank is empty and
changeover occurs.
Green indicator light does not
Manifold controller PCB defective.
Replace manifold controller PCB.
come on even though both banks
are full.
Pressure switch wiring incorrect or
Check pressure switch wiring.
disconnected.
Pressure switch set at too high a
Adjust pressure switch.
Pressure.
Primary regulator set at too low a
Adjust primary regulator delivery
pressure.
pressure.
Display reads “0” even when
Pressure transducer wiring
Check pressure transducer
pressure is present.
disconnected or faulty.
and controller board connections.
Pressure transducer faulty.
Replace transducer.
Display incorrect.
Dip switches set incorrectly.
Check setting of the Dip switches.
Pressure transducer faulty.
Replace transducer.
One of the green indicators is on
Non-volatile memory failure.
Replace manifold controller PCB.
and both red indicators are blinking.
No display and the green indicator
Input out of range during calibration
Adjust the line and primary
is flashing.
routine.
regulators prior to calibration.
Both Green LEDs are on and both
Pressure switch faulty.
Replace the pressure switch.
Red LEDs are on.
(both banks pressurized)
Pressure switch wiring disconnected.
Check wiring connections.
Wiring to pressure switch not correct.
Check internal leads to the
pressure
switch.
Pressure switch set to open above the
Adjust the switch/regulator to the
primary regulator setting.
correct setting.
Display indicating incorrect units.
Dip Switches must be set with
Remove power, set DIP switches
power off.
turn power back on.
