Format: PDF (Printable Document)
File Language: English
File Pages: 92
Brand: Clark
Model: EV T15 Control ET205 Forklift Troubleshooting
Book No: ET205
Type of Document: Technical Training
$ 40
About this Class…………………………………………………………………………………………….. 3
Class Objectives……………………………………………………………………………………. 3
Class Content………………………………………………………………………………………. 3
Sequence of Operations………………………………………………………………………… 3
Troubleshooting……………………………………………………………………………………… 4
Quiz……………………………………………………………………………………………………. 4
About Safety………………………………………………………………………………………… 5
Section 1. EV-T5 Control Sequence of Operations…………………………………………….. 6
Identification of Abbreviations………………………………………………………………. 6
Identification of Symbols……………………………………………………………………….. 7
Sequence 1. Drive Control…………………………………………………………………….. 8
Sequence 2. Connect the Battery…………………………………………………………… 10
Sequence 3.Close the KeySwitch…………………………………………………………… 12
Sequence 4. Energizing the Line Contactor……………………………………………. 14
Sequence 5. Energizing the Directional Contactors…………………………………. 16
Sequence 6. Turning ‘ON’ the MOSFETs………………………………………………… 18
Sequence 7. Turning ‘OFF’ the MOSFETs,Capacitor Charging and Flyback 20
Sequence 8. Accelerator, Thermal Protectors, and PMT………………………… 22
Sequence 9. 1A Contactor Operation……………………………………………………… 24
Sequence10. Plugging…………………………………………………………………………… 26
Sequence 11.Emergency Reverse…………………………………………………………… 32
Section 2. EV-T5 Control Troubleshooting……………………………………………………….. 34
Symptom 1. Line contactors will not close………………………………………………. 36
Symptom 2. Line contactor closes, Directional Contactors Will Not Close… 37
Symptom 3. Directional contactors close, no power, and No audible Sound,
truck inoperable with accelerator in FET range…………………… 38
Symptom 4.One Directional contactors closes With Normal Operation But
Other Directional Contactor Will Not Close…………………………. 39
Symptom 5. PMT Trips After Operating In 1A Mode and Returning to FET
Mode………………………………………………………………………………… 40
Symptom 6. Contactor Closes, Higher Than Normal Stall Currents in FET
Mode. C/L Pot Will Not Adjust. Contactors May Open Once
and Then Remain Open……………………………………………………… 40
Symptom 7. 1A contactor will not close on Rider…………………………………….. 41
Symptom 8. 1A Contactor Will Not Close on Walkie……………………………….. 42
Symptom 9. Stiff Plug and Distance Will Not Adust……………………………….. 43
Section 3. Component and Card Adjustment…………………………………………………….. 44
Card Adjustments ………………………………………………………………………………… 45
Component Identification………………………………………………………………………. 46
Internal Wiring……………………………………………………………………………………. 47
Checking Components (Battery)…………………………………………………………….. 48
Checking Components (MOSFETs)………………………………………………………… 49
Checking Components (#3&4 REC)…………………………………………………………. 50
Checking Components (Capacitor)………………………………………………………….. 51
Checking Components (TP, Shunt & Snubber)………………………………………… 52
