Franklin Fueling Systems STP-SCIIIC, Руководство по установке

Страница: 13 / 16

13
Flashes/Beeps Condition Potential Causes Proposed Action
3
(Continued)
6. Install 2 new O rings and 4 rubber washers. Attach new PMA
with 4 socket head cap screws and 4 lock washers; draw the
PMA tight to the connector housing with screws.
CAUTION: Key on lead assembly plug connector must line
up into keyway of connector housing for proper mating of PMA
receptacle.
4
Open Circuit
Or
Locked Rotor
with Thermal
Overload Open
Or
Relay Fault
Connection broken
from STP-SCIII to
PMA or Relay Failure
1. Wait 5 minutes before depressing the push button. This will
allow the thermal overload to reset if a locked rotor has
occurred on the ¾ or 1.5 hp pumps.
2. If condition is corrected, check for proper operation of
system; if operating correctly do not continue to the next
step.
3. Disconnect power at load center, lock and tag out circuit
breakers.
4. Remove cover from the STP-SCIII.
5. Remove the three motor control outputs (M1, M2 & M3)
from the STP-SCIII unit. Using an ohmmeter, measure the
winding resistance between all three leads (M1 to M2, M1 to
M3 and M2 to M3) and compare the values with the values
found in the STP/IST Installation Manual, High Capacity
Installation Manual or TB004.
6. Troubleshoot the wiring to determine the cause of the open
circuit between the STP-SCIII and the PMA.
Note: Always lockout and tagout power sources before servicing.
7. If the problem has been corrected, put the cover back on the
enclosure, turn on power to the STP-SCIII and verify system is
operating correctly.
8. Inspect the 3-phase relay. It may be stuck open or damaged.
Replace the relay.
8 Uncalibrated New Installation 1. Calibrate per “Calibration” section.
2. If condition is corrected, check for proper operation of
system; if operating correctly do not continue to next step. If
condition is still present continue to next step.
3. Check the following:
• Calibration is done at no flow (dead head).
• Hook signal is applied within 10 min. when set in calibration
mode.
• No open circuits between controller and motor.
• Lines have been purged.
• Proper Motor Horsepower Rating has been selected. (See
Table 3).
• Push button has not been depressed to silence the alarm
during calibration process.
4. If the above conditions are correct, contact Franklin Fueling
Systems Technical Support for assistance.