AWE SPD2H, Руководство пользователя

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G01
SPD Owner's Manual
29
TROUBLESHOOTING
Symptom: Nothing works - apparent no power. If there is power to the system and the circuit
breaker/power switch is energized, there should be a glow in the neon light of this switch. Over several
years this light will glow more dimly and then flicker. If no sign of light is present from the switch, check
for source power interruption.
If the light does glow but nothing else happens, check the fuse on the control transformer secondary. If
the fuse is good, check the secondary of the transformer for 24 volts AC when the main power switch is
on. If there is no voltage there, check for 220 volts AC at the primary of the transformer. Power here
means the transformer is faulty. No power here indicates the circuit breaker/power switch is faulty.
If the control transformer has 24 volts AC, check the output from the auxiliary circuit board to see if
there is 24 volts DC. If there is DC voltage, then the Keyence power and status LED's should indicate.
Symptom: Nothing works but electrical power is on.
When power is applied in the service mode, the
feed solenoid should open and the pump inlet pressure should rise. Check to see if there is indeed
feed water to the system by opening the prefilter vent to drain valve and check for the sound of running
water. If there is water but the solenoid doesn't open, check for the presence of 24 Volts AC to the
solenoid. No power here indicates a problem in the Keyence. If there is power, check the solenoid coil
for continuity. If it is OK, then the solenoid valve should be removed and repaired or replaced. If the
feed water is shut off nothing will work.
Symptom: Pump will not start but there is pump inlet pressure. If the loud click of the contactor is
heard shortly after the system is turned on, then the pump is getting the signal to turn on. If this click
cannot be heard, the failure is in the feed pressure switch A or the Keyence.
If the contactor pulls in but the pump doesn't start, first try resetting the overload button on the
underside of the Franklin control box. If this restarts the pump all may be OK if the overload doesn't trip
again; it if does there is a remaining problem with the control box, pump or motor.
The inside of the pump control box has instructions for checking the integrity of the start and running
capacitors as well as the potential relay. If all these check OK but the pump still will not run, or it runs
and then trips the overload, the problem must remain in the pump, the motor, or its feed cable.
Check the resistance of the wires to the pump where they connect to the terminal block in the Franklin
box. The resistance between the black and yellow leads should be 5.9 to 7.2 ohms. The resistance
between the red and yellow starting leads should be 6.2 to 12 ohms. If the resistances are high or low,
the problem is with the motor or feed cable. If the resistances are OK, the problem is with the pump
itself.
Symptom: PLC Failure – Emergency Operation. If the PLC stops working properly or not at all, it
must be replaced. The SPD system can be forced to run by jumpering the outputs that control the feed
solenoid and the pump relay R1.
REJECTION
Mathematically rejection is defined by: