Genie ZX-135/70 Service Manual page 166

August 2014
2 Turn and hold the service bypass/recovery
key switch to the recovery position. The
switch must be held in the recovery position.
Result: The auxiliary power unit will turn on
and the boom will begin the following recovery
sequence.
• The primary boom will retract.
• The primary boom will lower.
Note: The key switch must be held in the recovery
position until the recovery sequence is complete or
until the operator in the platform can safely exit the
platform.
Note: If any boom safety limit switches are faulty,
the boom will only retract and not lower and the
operator will need to be recovered from that point.
Note: If the Recovery function has been used, this
may indicate there may be faults with the machine.
Tag and remove the machine from service until the
fault has been corrected by trained personnel.
Part No. 218700
The ground control box (TCON) is the
communication and operations center for the
machine. The ground control box contains two key
switches. The key switch towards the top of the
control box is for selection of ground or platform
controls. The key switch at the bottom of the
control box is the Service Bypass key switch. It is
used when calibrating certain machine parameters
and also to correct an out-of-level platform. If the
machine trips an envelope safety switch, an
operator at the ground controls can turn and hold
the Service Bypass key switch in the recover
position, which will automatically retract the boom
and lower the platform close to the ground.
The ground control box contains a replaceable
membrane decal with touch sensitive buttons for
various machine functions. The ground control box
also contains two printed circuit boards:
The LCD (Liquid Crystal Display) circuit board
is mounted to the inside of the control box lid which
controls the LCD display screen.
The ECM circuit board is the main circuit board
for the machine. All operating parameters and
configuration of options for the machine are stored
in the ECM memory.
Note: When the ECM circuit board is replaced, the
joysticks will need to be calibrated. See repair
procedure, How to Calibrate a Joystick.
Note: When the ECM circuit board is replaced, all
the boom, platform and axle angle sensors will
need to be calibrated and in a specific order.
Contact Genie Product Support.
ZX-135/70
Service Manual
Ground Controls
151