Rehlko

P1-18

ErrorCooling

What This Code Means

LWT/auxiliary lamp flashing; No AC output while unit is running (except during first 10 seconds after start-up); Battery power was reconnected; Battery was low and then came back up while the generator master switch was in the RUN or AUTO position; LWT/auxiliary lamp lights and unit shuts down immediately; LWT/auxiliary lamp lights; Engine shuts down 5 seconds after fault occurs; Engine shuts down immediately; Engine shuts down; Lamp lights; Shuts down due to overspeed condition; Generator set will not start; Generator set stops running due to a fault shutdown; Fault lamp lit; High Engine Temperature Lamp Lights; Low Oil Pressure Lamp Lights; Overspeed Lamp Lights; Overcrank Lamp Lights; Overcrank Lamp Flashes; Auxiliary Lamp Flashes; Auxiliary Lamp Lights; Auxiliary lamp lights and engine shuts down 5 seconds after high oil temperature (P1-13), low coolant level (P1-14), or aux. delay shutdown (P1-15) faults occur.; Auxiliary lamp lights and engine shuts down immediately if overvoltag

Possible Causes

  • •Activated by customer-supplied sensing devices connected to auxiliary immediate shutdown ports (P1-17 and P1-18)
  • •Activation by customer-supplied sensing devices connected to auxiliary immediate shutdown ports
  • •Activation by customer-supplied sensing devices connected to auxiliary immediate-shutdown ports
  • •Auxiliary delay shutdown (P1-15) faults
  • •Battery is weak or undersized for the application
  • •Continuous cranking is more than 45 seconds
  • •Controller senses no AC output
  • •Cooling system malfunction
  • •Cyclic cranking is more than 75 seconds
  • •Engine low water temperature (P1-24) condition occurs
  • •Governed frequency exceeding 70Hz
  • •Governed frequency is in excess of 70Hz
  • •High engine temperature
  • •High oil temperature (P1-13)
  • •Locked rotor
  • •Low coolant level (P1-14)
  • •Low oil pressure
  • •Optional emergency stop switch is activated
  • •Optional emergency stop switch is reset while the generator master switch is in the AUTO or RUN position
  • •Overspeed
  • •Overvoltage condition arises
  • •Temporarily low battery condition

Suggested Actions

  1. 1(if equipped)
  2. 2(if sensor equipped)
  3. 3Fault conditions are inhibited during the first 30 seconds after crank disconnect.
  4. 4No manual reset is required.
  5. 5Place master switch in the OFF/RESET position.
  6. 6Place the generator master switch in the OFF/RESET position to clear this condition.
  7. 7Place the generator set master switch in the OFF/RESET position to clear this fault.
  8. 8Place the master switch in the OFF/RESET position to clear this condition.
  9. 9Refer to the Engine Service Manual for detailed information on correcting engine related faults
  10. 10Requires an optional emergency stop switch for the lamp to function.
  11. 11Requires an optional pre-alarm sender kit for the lamp to function.
  12. 12Reset the set after a fault shutdown (see Section 2—Operation)
  13. 13See Section 1—Specifications for specific model
  14. 14The local emergency stop switch is standard on Detroit Diesel-equipped 200--2000kW generatorsets.

Related Rehlko Fault Codes

P1-24SPD SENS FLTP1-17SPEED SENSOR FAULTP1-15SPN 730 FMI 3P1-14SPN 730 FMI 4P1-13SPN 966 FMI 31OVERTEMPERATURE FAULTSPN 1075 FMI 2
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