Alarm Logic:
Device malfunction
Pressure transducer faulty / Broken wire/ Connector disconnected / short circuit
Sensor failure / Controller failure / Broken wire/ Connector disconnected / short circuit
Trouble Shooting 1:
1. Check connector CN44 and make sure it is properly installed ~ Proceed to the next step if the
alarm still occurs
1.1 Connect gauge manifold, compare the value of pressure gauge and HPT ~ Replace HPT if the difference is greater than 100kPa
LPT or HPT value shows by monitoring data or display mode sensor. (refer to page 2-15)
1.2 Connect gauge manifold, compare the value of pressure gauge and LPT ~ Replace LPT if the difference is greater than 30kPa
Trouble Shooting 2:
Remove connector CN44 on CPU board and check if there is 5VDC from the controller LPT : CN44 No.1-2-3 (Black-White-Red) HPT : CN44 No.4-5-6 (Black-White-Red) Black-Red : 5VDC ~ If the input to transducer is 5VDC, check the transducer If input is less than 5V, check controller and wiring
Trouble Shooting 3:
Check connector CN43 and make sure it is properly installed ~ Proceed to the next step if the alarm still occurs
Trouble Shooting 4:
Remove CN43 connector and check sensor resistance ~ Sensor is functioning if it matches the resistance and temperature sensor characteristics table (refer to pages 6-2 and 6-3)
Controller Action:
F405 Unit stopped
F407 Unit stopped
F409 Unit stopped
- F405 High pressure sensor (HPT) fault (E415) & discharge gas temperature sensor (DCHS) fault (E405)
- F407 Low pressure sensor (LPT) fault (E413) & high pressure sensor (HPT) fault (E415)
- F409 Low pressure sensor (LPT) fault (E413) & discharge gas temperature sensor (DCHS) fault (E405)
Device malfunction
Pressure transducer faulty / Broken wire/ Connector disconnected / short circuit
Sensor failure / Controller failure / Broken wire/ Connector disconnected / short circuit
Trouble Shooting 1:
1. Check connector CN44 and make sure it is properly installed ~ Proceed to the next step if the
alarm still occurs
1.1 Connect gauge manifold, compare the value of pressure gauge and HPT ~ Replace HPT if the difference is greater than 100kPa
LPT or HPT value shows by monitoring data or display mode sensor. (refer to page 2-15)
1.2 Connect gauge manifold, compare the value of pressure gauge and LPT ~ Replace LPT if the difference is greater than 30kPa
Trouble Shooting 2:
Remove connector CN44 on CPU board and check if there is 5VDC from the controller LPT : CN44 No.1-2-3 (Black-White-Red) HPT : CN44 No.4-5-6 (Black-White-Red) Black-Red : 5VDC ~ If the input to transducer is 5VDC, check the transducer If input is less than 5V, check controller and wiring
Trouble Shooting 3:
Check connector CN43 and make sure it is properly installed ~ Proceed to the next step if the alarm still occurs
Trouble Shooting 4:
Remove CN43 connector and check sensor resistance ~ Sensor is functioning if it matches the resistance and temperature sensor characteristics table (refer to pages 6-2 and 6-3)
Controller Action:
F405 Unit stopped
F407 Unit stopped
F409 Unit stopped
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