McQuay RVSS14 Installation, Operation And Maintenance Manual page 42

Code Description
High Line
F24
L1-L2
High Line
F25
L2-L3
High Line
F26
L3-L1
F27 Phase Loss
F28 No Line
42
Detailed Description of Fault / Possible Solutions
High voltage above the Over voltage Trip Level parameter setting (PFN 07, P30) was
detected for longer than the Over/Under Voltage Trip delay time (PFN 09, P32).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN 05,
Line power quality problems/ excessive line distortions.
High voltage above the Over voltage Trip Level parameter setting (PFN 07, P30) was
detected for longer than the Over/Under Voltage Trip delay time (PFN 09, P32).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN 05,
Line power quality problems/ excessive line distortions.
High voltage above the Over voltage Trip Level parameter setting (PFN 07, P30) was
detected for longer than the Over/Under Voltage Trip delay time (PFN 09, P32).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN 05,
Line power quality problems/ excessive line distortions.
The D3 control has detected the loss of one or more input or output phases when the
starter was running. Can also be caused by line power dropouts.
Check input supply for open fuses.
Check power supply wiring for open or intermittent connections.
Check motor wiring for open or intermittent connections.
On medium voltage systems, verify wiring of the voltage feedback measurement circuit.
Check Gate and Cathode connections to D3 board
No input voltage was detected for longer than the Inline Configuration time delay
parameter setting (I/O 15, P53) when a start command was given to the starter.
If an inline contactor is being used, verify that the setting of the Inline Configuration time
delay parameter (I/O 15, P53) allows enough time for the inline contactor to completely
close before the No Line fault occurs.
Check input supply for open disconnects, open fuses, open circuit breakers, or
disconnected wiring.
Verify that the SCR gate wires are properly connected to the D3 control board.
On medium voltage systems, verify wiring of the voltage feedback measurement circuit.
P66
) is set correctly.
P66
) is set correctly.
P66
) is set correctly.
IOMM Starter