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• If RTD (Resistive Temperature Device) probe is defective, replace the probe.
NOTE: If ALL systems check out fine, call the ADC Service Department at (508) 678-9000.
2. No Control Power (“BLUE” Light Off)
a. PROBABLE CAUSES;
1a) Line voltage from main fused disconnected.
2a) Main disconnect on the ADS-464 is turned off.
3a) OL11 (overload #11) tripped.
4a) Fuse #1 is blown.
b. POSSIBLE SOLUTIONS;
1b) Verify main line voltage to ADS-464
• If line voltage is present go to paragraph #2b below
• If line voltage is not present check fused disconnect and re-test
2b) Attempt to turn the ADS-464 main power handle to the “ON” position
• If the switch does not engage, verify that sprinkler power is “ON” (“RED” light on main door)
• If “NO,” refer to paragraph #1b above
3) Open main enclosure and verify that OL11 has not tripped
• If “YES,” check circuit, restart and test
• If “NO.” go to section #3 on page 47
• Verify that fuse #1 has not blown, check that the “RED” L.E.D. indicator is off.
• If “ON.” (fuse block L.E.D. “ON”), check circuit, replace fuse and test.