Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018 103
Troubleshoot the 8720MC-RPS Unit Chapter 8
Table 32 - Error Codes Relating to Follower Units 1
Table 33 - Error Codes Relating to Follower Units 2
Error Code Error Description Error Cause Corrective Action
P. U 2
Small unit - Power
Module Phase L1 Error
Over current, overheat, or voltage drop of gate
power supply occurs in the L1 phase power
modules of the follower1 unit.
Same as P.U1.
Large unit - Power
Module Over Current
Overcurrent or short circuit occurs in power
modules of the follower1 unit.
PU.2
Small unit - Power
Module Phase L2 Error
The phase L2 power module of the follower1
unit is faulty.
Same as PU.1.
Large unit Large unit is not used.
PU2.
Small unit - Power
Module Phase L3 Error
The phase L3 power module of the follower1
unit is faulty.
Same as PU1.
Large unit - Module
Overheating Error
Power modules of the follower1 unit has been
overheated.
FA2 Fan Error
Small unit - Cooling fan of the follower1 unit
failed.
Same as FA1.
Large unit- The follower1 unit or cooling fan of
the line reactor failed. The line reactor is
overheated. Fuse for the control power supply
(FU3) of the follower1 unit is blown. Power
supply board (APS) failed.
LE2 Line Connect Error
The phases (L1, L2, and L3) of the AC input
power of the follower1 unit do not match with
those of the control power.
Same as LE1.
PS2 Power Supply Board Error
The Power Interface Board (PIFS) of the
follower1 unit is faulty.
Same as PS1.
Error Code Error Description Error Cause Corrective Action
P. U 3
Small unit - Power
Module Phase L1 Error
Over current, overheat, or voltage drop of gate
power supply occurs in the L1 phase power
modules of the follower2 unit.
Same as P.U1.
Large unit - Power
Module Over Current
Overcurrent or short circuit occurs in power
modules of the follower2 unit.
PU.3
Small unit - Power
Module Phase L2 Error
The phase L2 power module of the follower2
unit is faulty.
Same as PU.1.
Large unit Large unit is not used.
PU3.
Small unit - Power
Module Phase L3 Error
The phase L3 power module of the follower2
unit is faulty.
Same as PU1.
Large unit - Module
Overheating Error
Power modules of the follower2 unit has been
overheated.
FA3 Fan Error
Small unit - Cooling fan of the follower2 unit
failed.
Same as FA1.
Large unit- The follower2 unit or cooling fan of
the line reactor failed. The line reactor is
overheated. Fuse for the control power supply
(FU3) of the follower2 unit is blown. Power
supply board (APS) failed.
LE3 Line Connect Error
The phases (L1, L2, and L3) of the AC input
power of the follower2 unit do not match with
those of the control power.
Same as LE1.
PS3 Power Supply Board Error
The Power Interface Board (PIFS) of the
follower2 unit is faulty.
Same as PS1.
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