Vertiv Liebert DME22 - Page 116

Vertiv | Liebert® DM | User Manual 107
Troubleshooting
Symptom Possible Cause User Needs to Check Particulars or Processing Method
Pressure sensor
failure
Pressure sensor failure
Check if the condensing pressure sensor cabling is
firmly connected or contact Vertiv representative for
maintenance support or engineering assistance.
Energy-saving card
failure
The number of normal online
energy-saving cards is less than the
number of preset energy-saving
cards.
The number of energy-saving cards must be greater than
or equal to the set number.
Energy-saving card DIP switching
address is incorrect
Contact Vertiv representative for maintenance support or
engineering assistance.
More than one energy-saving card
measures temperature and humidity
beyond the measurement range
Contact Vertiv representative for maintenance support or
engineering assistance.
Power loss alarm
The unit is in operation and the
power is lost and then restored
Check if the power input line is in good condition.
Power supply over-
voltage alarm
Power supply voltage deviates from
set value
Check if the power input line voltage is in good condition.
Power supply
under-voltage
alarm
Power supply voltage deviates from
set value
Check if the power input line voltage is in good condition.
Power supply
frequency oset
Power supply frequency deviates
from set value
Check if the power input line frequency is in good
condition.
Power supply phase
loss alarm
Power supply phase loss Check if the power input line cabling are in good condition.
Power supply
reverse phase
rotation alarm
Power supply reverse phase rotation Check if the power input line cabling are in good condition.
Warranty expiry
alarm
The product usage time reaches the
“warranty period”
Contact Vertiv representative for maintenance support or
engineering assistance.