Flowserve F75 Series Fail-Safe Module - Manual (Page 5)

WCAIM2029 Series F75 Fail-Safe Module 5
7.3 Troubleshooting
Symptom Check Results
1. Unit has switched to the fail-safe mode. No Operate panel “Reset” switch. The unit should reset to AC line
other evidence of AC power failure. operation as indicated by panel lamps
lighting. If not, proceed to 2.
2. Unit has switched to fail-safe mode. No Check terminals 9, 10 for If power supply will be 90 V or less,
other evidence of AC power failure. normal line power. check AC power circuit. If normal, AC
to DC power supply is defective.
3. Red alert light stays on. Actuator operates Terminals 6, 7 with battery 27.6 VDC (-2%, +5%) should be
normally on AC line power. leads disconnected. found on terminals. Low or zero volts
indicate defective charge circuit.
4. Yellow light (high charge rate light) stays on Terminals 6, 7 for voltage If readings agree with manual or can
after extended charge period. readings as shown in paragraph 5. be adjusted to agree and conditions
persist, replace batteries.
5. Actuator inoperative. Panel lamps indicating Check continuity and operation If external circuit is operating properly,
normal line power available. of external control circuit wired proceed to 6.
to terminals 4 and 5.
6. Actuator inoperative. Panel lamps indicating With external control circuit in the Voltage on terminals 2, 3 should be
normal line power available. off state (open circuit) check 24 VDC (negative on 3, positive on 2).
voltage on terminals 2 and 3. If correct, go to 7.
7. Actuator inoperative. Panel lamps indicating With external control circuit in the Voltage on terminals should be 24 VDC
normal line power available. on state (closed circuit) check (negative on 2, positive on 1). If voltage
voltage on terminals 1 and 2. correct on all terminals 1, 2, 3, check
actuator wiring and actuator. If
incorrect, unit relay switching circuit is
defective. Module should be replaced
or repaired by factory.
Flow Control Division
Worcester Actuation Systems
8. ELECTRICAL REQUIREMENTS
Normal power supply: 120 VAC, 60 Hz, single-phase
240 VAC, 50 Hz, single-phase
Alternative power supply: Large external lead-acid batteries as
non-interruptible 24 VDC supply
Coupled to: Size 20 Series F75 Module with 10 to
23 Series 75 actuator
Any other motor-powered reversing device that uses 24 VDC may be
run by the Series F75 module.
Maximum amperage rating: Size 20 Series F75 Module, 4.0 amps