E62 Maximum supply voltage exceeded (combined monitor)
E66 exceeds the maximum voltage of the power supply (APC controller)
E01 Kato excavator automatic deceleration control stop, LCD display
E02 The excavator quickly decelerates and stops, and the alarm light turns on.

Kato excavator electrical system fault code——[E21-E93]

Excavator fault code E21 Kato excavator automatic deceleration and rapid deceleration control stop
E22 Kato Excavator APC Mode HML Select Cancel
Kato excavator fault code E20 excavator motor cannot stop
E10 No pulse signal output in E/G speed sensor
Excavator fault code E11 The pulse output signal of the excavator engine speed sensor exists, but cannot be detected. The generated voltage is normal.
Kato excavator fault code E12 Kato excavator engine speed sensor pulse output signal exists, but the generated voltage is too low
Kato excavator fault code E13 Kato excavator engine speed exceeds the rated range
E56 Excavator rotation lock solenoid valve wire is disconnected or short-circuited
Kato excavator fault code E63 excavator Pl pressure sensor wire open circuit or short circuit
E64 P2 pressure sensor wire is broken or shorted
E71 Excavator pressure switch (traveling mechanism) fails
Kato excavator fault code E93 pressure (rotation) failure
The hydraulic oil temperature of E60 Kato excavator is high and the oil temperature exceeds 200 degrees Celsius. The excavator LCD displays and the alarm light comes on.
Kato excavator fault code E61 Kato excavator has too much fuel and the fuel level signal exceeds the maximum value



When the APC100 detects an error during a self-diagnostic check, it sends a message to the display and the warning light illuminates or flashes, notifying the operator that a system malfunction has occurred. If necessary, the failure protection will also work to ensure the normal operation of the machine. The meaning of the error code is shown in Table 13-21.

In addition, the APC100 has an adjustment mode that provides relevant maintenance information.

ROM version: 1.07- (Adjustment mode: KROM).
Error message display Error code number Error details Failsafe action
Multiple display fault E62 Maximum power supply voltage exceeded (combined monitor) A. B C. G
E66 exceeds the maximum voltage of the power supply (APC controller)
E01 Faulty RAM (combined monitor)
E02 Faulty PROM (combined monitor)
Electrical system failure E21 CPU failure (combined monitor) A. B C E G
E22 CPU failure (APC controller)
E20 Motor cannot stop C. G-1
E10 No pulse signal output in E/G speed sensor A CG
E11 The engine speed sensor pulse output signal exists but cannot be detected. However, the voltage produced is normal
E12 The engine speed sensor pulse output signal exists, but the generated voltage is too low A. B C. G
E13 Engine speed exceeds rated range
E56 Rotary lock solenoid valve wire is powered off or short-circuited C. G
E63 Pl pressure sensor wire open or short circuit A. C. G
E64 P2 pressure sensor wire is broken or shorted
E71 Pressure switch (travelling mechanism) fails
E93 Pressure (rotation) failure C. G

E61 fuel level signal exceeds the maximum value, LCD displays, and the alarm light lights up
E60 hydraulic oil temperature signal exceeds 200, LCD display, alarm light
Display of E21 and E22
Automatic deceleration and rapid deceleration control stop; APC mode H.M.L selection is eliminated, fixed current control (MO or LO current value output); LCD display; APC control software is replaced (from real time control mode to sequential cycle control mode); alarm Light.
E01, E02 display
Automatic deceleration and rapid deceleration control stop; APC mode H.M.L selection is eliminated, fixed current control (MO or LO current value output); LCD display; alarm light is on.

Kato HD820 fault code

Fault code description

EO1 RAM failure

E02 P-ROM failure

E03 P-ROM selection is inappropriate

E05 P-ROM failure

E06 M-ROM failure

E07 M-ROM selection is inappropriate

E10 There is no pulse output information in the E/G speed sensor

E11 There is pulse output information in the E/G speed sensor, but it cannot be detected. However, the voltage generated is normal.

E12 There is pulse output information in the E/G speed sensor, but the voltage generated is too low.

E13 Motor speed exceeds rated range

E20 engine cannot be shut down

E21 APC controller CPU failure

E22 monitor CPU failure

E30 accelerator switch potentiometer output value exceeds 90%, throttle regulator only exceeds 90%

E31 The target engine speed exceeds the actual speed by more than 350r/min.

E32 The output value of the accelerator switch potentiometer is less than 5%

E33 The difference between the accelerator dial reading and the motor target speed is more than 200r/min.

E34 accelerator dial value exceeds 101% (SPAD)

E35 accelerator dial value is less than 5%

E40 has more than two working mode selection switch signal inputs (heavy task operation, general task operation, good control, slow operation)

E41 has more than two APC mode switch signal inputs (H, M, L mode)

E42 automatic slow down switch is always on

E43 fuel saving mode switch is always on

E45 buzzer switch is always on

E46 walking mode switch is always on

E47 monitor selector switch is always on

E50 Proportional solenoid valve feedback current exceeds the allowable value

E52 Pressurized solenoid valve circuit open or short circuit

E53 boom slow speed solenoid valve short circuit or open circuit

E54 Stick one/two speed selector solenoid valve circuit short circuit or open circuit

E55 Travel H/L selector solenoid valve circuit short circuit or open circuit

E56 Rotary lock solenoid valve circuit short circuit or open circuit

E60 hydraulic oil temperature signal value exceeds 200

E61 Fuel level signal value exceeds the maximum value

E62 Maximum power supply voltage exceeded

E63 P1 pressure switch sensor circuit short circuit or open circuit

E64 P2 pressure switch sensor circuit short circuit or open circuit

E66 Maximum power supply voltage exceeded

E70 Pressure switch failure (upper unit)

E71 Pressure switch failure (walking)

E72 alarm bulb burned out

E73 E/G glow indicator bulb burned out

E80 information error

E83. E84 E2PROM failure

E90 Audible alarm output error

E91 joystick button backup switch failure

E92 Pressure switch failure (rotation)

E93 Pressure switch failure

E94 Rapid acceleration switch failure