McQuay WSC Operating Manual page 76

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
A02
A10
A11
A12
A13
A14
A15
A21
A22
A23
A24
A25
A26
A27
A28
Continued on the next page.
76
Description
Motor Overload Alarm
Phase Rotation not ABC
Phase Rotation not CBA
Low Line Frequency
High Line Frequency
Input power not single phase
Input power not three phase
Low Line L1-L2
Low Line L2-L3
Low Line L3-L1
High Line L1-L2
High Line L2-L3
High Line L3-L1
Phase Loss
No Line
Notes
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.
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.
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.
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.
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.
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.
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.
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 21
may occur.
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 22
may occur.
This alarm exists while the D3 is stopped and low line
voltage is detected. If a start is commanded, a Fault 23
may occur.
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 24
may occur.
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 25
may occur.
This alarm exists while the D3 is stopped and high line
voltage is detected. If a start is commanded, a Fault 26
may occur.
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.
This alarm exists while the D3 needs to be synced or is
trying to sync to the line and no line is detected.
OM Centrif Micro ΙΙ-5