TCM FB20-8 - Page 222

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3. TROUBLESHOOTING GUIDE
(8)
413
16
: Pump motor inverter unit U-phase FET open
Resets when the key switch is turned OFF.
414
17
: Pump motor inverter unit V-phase FET open
Resets when the key switch is turned OFF.
415
18
: Pump motor inverter unit W-phase FET open
Resets when the key switch is turned OFF.
① Check the pump motor for loose terminals.
Retighten.
② Check the pump motor cable.
Correct the cable.
③ Replace the pump motor inverter unit.
(9)
416
24
: V-phase current detection abnormal
AD input too low, AD input too high
Resets when the key switch is turned OFF.
416
25
: V-phase current offset abnormal
AD input too low, AD input too high
Resets when the key switch is turned OFF.
416
26
: W-phase current detection abnormal
AD input too low, AD input too high
Resets when the key switch is turned OFF.
416
27
: W-phase current offset abnormal
AD input too low, AD input too high
Resets when the key switch is turned OFF.
① Replace the pump motor inverter unit.