Emerson Liebert MC Microchannel Outdoor Condenser 28 - 220kW User Manual
Control Operation
Liebert
®
MC
™
48
Table 18
EC Fan alarm information
Alarm ID
Meaning
Possible Cause
Handling Method
(1-4) 00
EC Fan high link current
1. EC Fan is locked.
2. EC Fan is damaged.
For cause 1, check if EC Fan is
locked.
For cause 2, replace EC Fan
(1-4) 01
EC Fan drive error
EC Fan is damaged.
Replace EC Fan
(1-4) 02
EC Fan earth to ground fault
EC Fan is damaged.
Replace EC Fan
(1-4) 03
EC Fan electronics heat sink thermal
overload
1. EC Fan is locked.
2. EC Fan is damaged.
3. Ambient temperature is too
high
For cause 1, check if EC Fan is
locked.
For cause 2, replace EC Fan
For cause 3, check ambient
temperature.
(1-4) 04
EC Fan Hall failure
EC Fan is damaged.
Replace EC Fan
(1-4) 05
EC Fan IGBT failure
EC Fan is damaged.
Replace EC Fan
(1-4) 06
EC Fan line fault
Power supply abnormal
Check power supply
(1-4) 07
EC Fan motor locked
Motor is locked
Check if EC Fan is locked.
(1-4) 08
EC Fan motor thermal overload
1. EC Fan is locked.
2. EC Fan is damaged.
3. Ambient temperature is too
high
For cause 1, check if EC Fan is
locked.
For cause 2, replace EC Fan
For cause 3, check ambient
temperature.
(1-4) 09
EC Fan phase failure alarm
Phase failure
Check power supply
(1-4) 10
EC Fan-specific uncategorized alarm
detected
Internal EC Fan issue
Re-boot condenser if fans not
running. If alarm persists and fans
not running, replace fan.
(1-4) 11
EC Fan-specific uncategorized
warning detected
(1-4) 12
EC Fan electronics high-temperature
condition.
1. EC Fan is locked.
2. EC Fan is damaged.
3. Ambient temperature is too
high
For cause 1, check if EC Fan is
locked.
For cause 2, replace EC Fan
For cause 3, check ambient
temperature.
(1-4) 13
EC Fan high link voltage
1. EC Fan input power supply
high voltage
2. EC Fan is damaged.
For cause 1, measure power
supply voltage and check if the
voltage is normal
For cause 2, replace EC Fan
(1-4) 14
EC Fan low link voltage
1. EC Fan input power supply low
voltage
2. EC Fan detection error
(1-4) 15
EC Fan 485 communication failure
1. Communication between EC
Fan and PCB board failure
2. EC Fan 485 communication
failure
3. Board has problems
4. EC fan not receiving power
For cause 1, check EC Fan
communication circuit
For cause 2, replace EC Fan
For cause 3, replace PCB board
For cause 4, check fan model is
not set for “0”, check that the
contactor for the particular fan is
energized, and check fan fuses.
NOTE
(1-4) means the EC Fan addresses. For example, (1-4) 00 means 100 for EC Fan1, and means
(1-4) means the EC Fan addresses. For example, (1-4) 00 means 100 for EC Fan1, and means
200 for EC Fan2, and means 300 for EC Fan3, and means 400 for EC Fan4.