McQuay WSC User Manual

76 OM Centrif Micro ΙΙ-5
Alarm Definitions
The following is a list of all D3 alarm codes. The alarm codes correspond to associated fault
codes. In general, an alarm indicates a condition that if continued, will result in the associated
fault.
Table 32, Alarm Codes
Alarm
Code
Description Notes
A02 Motor Overload Alarm
This occurs when the motor thermal content reaches the
90%. The D3 will trip when it reaches 100%. The alarm
will continue until the overload trip lockout is reset.
A10 Phase Rotation not ABC
This alarm exists while the D3 is stopped and line
voltage is detected and phase sensitivity parameter is
set to ABC. If a start is commanded, a Fault 10 will
occur.
A11 Phase Rotation not CBA
This alarm exists while the D3 is stopped and line
voltage is detected and phase sensitivity parameter is
set to CBA. If a start is commanded, a Fault 11 will
occur.
A12 Low Line Frequency
This alarm exists when the D3 has detected a line
frequency below the user defined low line frequency
level. The alarm will continue until either the line
frequency changes to be in range or the fault delay timer
has expired.
A13 High Line Frequency
This alarm exists when the D3 has detected a line
frequency above the user defined high line frequency
level. The alarm will continue until either the line
frequency changes to a valid frequency or the fault delay
timer has expired.
A14 Input power not single phase
This alarm exists while the D3 is stopped, set to single
phase mode, and line voltage is detected. If a start is
commanded, a Fault 14 will occur.
A15 Input power not three phase
This alarm exists while the D3 is stopped, set to a three-
phase mode, and single-phase line voltage is detected.
If a start is commanded, a Fault 15 will occur.
A21 Low Line L1-L2
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 21
may occur.
A22 Low Line L2-L3
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 22
may occur.
A23 Low Line L3-L1
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 23
may occur.
A24 High Line L1-L2
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 24
may occur.
A25 High Line L2-L3
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 25
may occur.
A26 High Line L3-L1
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 26
may occur.
A27 Phase Loss
This alarm exists while the D3 is running and a phase
loss condition is detected, but the delay for the fault has
not yet expired. When the delay expires, a Fault 27 will
occur.
A28 No Line
This alarm exists while the D3 needs to be synced or is
trying to sync to the line and no line is detected.
Continued on the next page.

McQuay WSC Specifications

General

Brand	McQuay
Model	WSC
Category	Controller
Language	English