Replace system controller field fix.
Bad system controller.
Solution
Possible Cause
TOTAL shutdown.
Criteria
Resulting Effect
SYSTEM CONTROL CONFIGURATION ERROR
Fault condition
E79c
E79c
Replace display board.
Bad operator display board.
Solution
Possible Cause
TOTAL shutdown.
Criteria
Resulting Effect
DISPLAY CONFIGURATION FAILURE
Fault condition
E79d
E79d
Replace with fully charged battery.
Discharged battery.
Solution
Possible Cause
The battery state of charge (BSOC) reading has
reached the programmed limit.
LIFT system, except lower, shutdown.
Criteria
Resulting Effect
LIFT CUTOUT DUE TO LOW BATTERY STATE OF CHARGE
Fault condition
E80
E80
LO
LO
BATT
BATT
Replace upper control handle.
Wires shorted in control handle harness.
Replace upper control handle.
Damaged or defective keypad switch and/or pcb
in control handle.
Disassemble and clean.
Foreign material in keypad switch.
Cycle keyswitch.
Operator pressing opposite sides of the
tilt/sideshift disk at once or too fast.
Solution
Possible Cause
Both tilt switches or both sideshift switches closed
at the same time.
LIFT system, except lower, shutdown.
Criteria
Resulting Effect
EACH BUTTON STUCK
Fault condition
E81
E81
E
lectric
C
ounterbalance
H
igh
O
utput
Troubleshooting
REV 12/5/99
TS.16
