Service Manual
February 2022
Platform Controls
32
GRC
™
Part No. 1314708GT
Operational Indicator Codes
These codes are generated by the electrical
system to indicate machine operating status.
During normal operation, a code will appear in the
platform controls LED readout if a condition such
as off-level, overload cutout, chassis mode
operation or pothole guard stuck occurs.
If the platform controls LED readout displays an
operational indicator code such as
LL
, the fault
condition must be repaired or removed before
resuming machine operation. Push in and pull out
the red Emergency Stop button to reset the
system.
Platform Controls LED Readout
Code Condition
LL
Off-Level
CH
Chassis Mode Operation
PHS
Pothole Guard Stuck
Nd
No Drive (option)
CHrg Charger Interlock (option)
Note: A code and a description of a code can also
be viewed at the ground controls LCD display.
1-1
Circuit Board
How to Remove the Platform
Controls Circuit Board
1 Push in the red Emergency Stop button to the
off position at both the ground and platform
controls.
2 Disconnect the platform controls from the
control cable at the platform.
3 Remove the fasteners securing the platform
control box to the platform control bracket.
4 Remove the fasteners securing the bottom
cover to the platform control box. Open the
control box.
5 Remove the ties securing the wire harness.
6 Disconnect the red and black wires from the
alarm.
7 Carefully remove the alarm from the platform
control box.
Summary of Contents for Genie GRC-12
Page 113: ...February 2022 Service Manual 101 Electrical Schematic GRC Options...
Page 115: ...February 2022 Service Manual 103 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 118: ...Service Manual February 2022 106 Electrical Schematic GRC from GRC11 1000 to GRC11 1078...
Page 119: ...February 2022 Service Manual 107 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 122: ...Service Manual February 2022 110 Electrical Schematic GRC from GRC11 1079 to GRC14 1780...
Page 123: ...February 2022 Service Manual 111 Electrical Schematic GRC from GRC14 1781 to GRC15 2343...
Page 126: ...Service Manual February 2022 114 Electrical Schematic GRC from GRC15 2344 to GRC16P 2481...
Page 127: ...February 2022 Service Manual 115 Electrical Schematic GRC from GRC16P 2482 to GRC16P 2562...
Page 130: ...Service Manual February 2022 118 Electrical Schematic GRC from GRC16P 2563 to GRCP 5999...
Page 131: ...February 2022 Service Manual 119 Hydraulic Schematic GRC from GRC11 1000 to GRC12 1168...
Page 135: ......