64 ACH550 Installation, Operation and Maintenance Manual
ACH550 E-Clipse Bypass
Bypass Select Key
The Bypass Select Key selects the bypass as the power source for the motor.
Off/Reset Key
The Off/Reset Key may be used to manually stop the motor if the motor has been
running on bypass power. The Off/Reset key also resets most bypass faults. It may
take several minutes before the bypass can be reset after an overload trip. If a
bypass fault condition is present the second press of this key places the bypass in
the OFF mode.
Auto Key
The Auto Key selects the Auto Start contact or serial communications as the means
for starting and stopping the motor in the bypass mode.
Hand Key
The Hand Key can be used to manually start the motor when the bypass has been
selected as the power source for the motor.
Bypass control panel modes
The HVAC Bypass Control Panel has several different modes for configuring,
operating and diagnosing the bypass. Select MENU and use the UP/DOWN buttons
to select modes. The modes are:
• Default Display mode – Provides (HAND/OFF/AUTO) indication of the bypass
operating control mode.
• Bypass Status mode – Provides status indications of the current system operating
conditions.
• Start-Up Parameter Mode – Provides a list of parameters or operating conditions
that may be configured or viewed during startup.
• Parameter List mode – Used to edit parameter values individually.
• Changed Parameter mode – Displays changed parameters.
• Bypass Fault Display mode – If there is an active bypass fault, the control panel
will flash the fault number and fault diagnostic indication in English.
• Bypass Alarm Display mode – If there is an active bypass alarm, the control panel
will flash the alarm number and alarm diagnostic indication in English.
Start-up by changing the parameters from the start-up list
To change the parameters, follow these steps:
1The Default Display indicates the
Bypass Control mode.
2 Press ENTER to enter the Main Menu.
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