Appendix B: Troubleshooting - Vertiv MPH2 Installer/User Manual

Appendix B: Troubleshooting

NOTE: Per UL 60950-1 2nd Ed. ITE safety-standard requirements, the current ratings of UL Listed
models are 80% of input-plug, branch-circuit-breaker and receptacle maximum current ratings.
Table B.1 Receptacle LED Troubleshooting
LED INDICATION
(ONE OR ALL LEDS)
STATE/
COLOR FLASH
SPEED
Green Steady On
Green Fast
Off NA
Green Slow
Red Fast
Red
Pulse
(All
LEDs)
Green
Slow
(All
LEDs)
Red
Fast
(All
LEDs)
Vertiv | Vertiv™ MPH2 Rack PDU Installer/User Guide
AUDIBLE
CONDITION STATUS/RECOMMENDED ACTION
ALARM
Input-voltage-
supported
— Normal Operation
Receptacle
Powered-on
Remote user is requesting receptacle identification.
Receptacle
—
Identification
The LED should stop flashing after 10 seconds.
— Voltage Off Check receptacle power control settings.
Check for changing load conditions.
Overcurrent
—
Warning
Check overcurrent warning threshold settings.
Check for changing load conditions.
Overcurrent
Alarm
Check overcurrent alarm threshold settings.
ü
Check for removal of load.
Undercurrent
Alarm
Check undercurrent alarm threshold settings.
Check for changing load conditions; confirm circuit breaker actuator is closed. If open,
Branch Circuit correct loading condition before pressing circuit breaker actuator closed again.
—
Breaker Open NOTE: On single-phase, switched-receptacle models, this may indicate that the input-
power line and neutral are swapped.
Branch
Check for changing load conditions.
— Overcurrent
Check overcurrent warning threshold settings.
Warning
Branch
Check for changing load conditions.
ü
Overcurrent
Check overcurrent alarm threshold settings.
Alarm
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