54 ACH550 Installation, Operation and Maintenance Manual
ACH550 E-Clipse Bypass
2. Check installation – bypass
Control panel settings and checks
Apply power to the E-Clipse Bypass unit. The ACH550 Control Panel should show
the operating status of the drive. If the E-Clipse Bypass Control Panel displays a
PHASE SEQ (Phase Sequence) fault, remove power, wait at least 5 minutes and
then swap any two input phase wires. If the motor is a standard 208 V, 60 Hz motor
connected to a 208 V drive or a 460 V, 60 Hz motor connected to a 480 V drive, the
default parameter settings should be suitable for the initial tests described below. If
the motor’s rating is not 208 V or 460 V, 60 Hz, the MOTOR NOM VOLT and
MOTOR NOM FREQ parameters will need to be properly set before proceeding.
Refer to the ACH550-UH User’s Manual and set the parameters as required.
Note: The settings for ALL external serial communication between the ACH550 with
E-Clipse Bypass and any Building Automation System are configured using the
E-Clipse Bypass operator panel. DO NOT attempt to configure the external serial
communication connection using the ACH550 operator panel!
The settings for internal communication between the ACH550 and the E-Clipse
Bypass are configured at the factory and require no adjustment.
Drive Link recovery procedure
If the ACH550 Drive communication settings are unintentionally changed during
setup a “Drive Link Fault”, “Drive Link Error” or “Drive Setup” alarm may be
displayed. Should this occur, accomplish the following steps in order.
Using the ACH550 Drive Keypad
1. Set Parameter 9802 to “STD MODBUS”
2. Set Parameter 9902 to “E-CLIPSE”
3. Cycle Power
Following the above steps, in order, should restore proper communications between
the ACH550 Drive and the E-Clipse Bypass. Should the E-Clipse Keypad continue to
display a “Drive Link Fault”, “Drive Link Error” or “Drive Setup” alarm, check the
following parameter settings to ensure they have been recovered. If necessary,
individually set the correct parameter settings as indicated below and cycle power.
The only ACH550 Drive macro that provides the proper configuration settings by
default is the E-Clipse Bypass macro. If any other ACH550 Drive macro is used, that
macro should be selected after completing the initial tests. When using any other
macro the following ACH550 Drive parameter values must be set and power cycled
or the E-Clipse Bypass will not function properly:
• Parameter 9802 must be set to “STD MODBUS”
• Parameter 1001 must be set to “Comm”
• Parameter 1002 must be set to “Comm”
• Parameter 1601 must be set to “Comm”
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