Huawei NetCol5000-A - Page 157

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
149
Alarm
ID
Alarm
Alarm
Severity
Impact
Possible Cause
Solution
open
generated.
the lower threshold.
voltage meets specifications.
a152
Outdoor
fan driver
fault
Warning
The alarm
is
generated.
1. A cable of the fan is loose
or disconnected.
2. The fan is blocked.
3. The fan is faulty.
1. Secure the cables
connected to fan
terminals.
2. Clear obstacles in the fan.
3. Replace the fan.
a153
Outdoor
fan Dr DC
bus
undervol
Major
The alarm
is
generated.
1. A power grid input
cable is loose.
2. The power grid voltage is
below the lower
threshold.
1. Secure the power grid
input cable.
2. Power off the driver and
verify that the supply
voltage meets
specifications.
a154
Outdoor
fan Dr DC
bus
overvolt
Major
The alarm
is
generated.
The power grid voltage
exceeds the upper threshold.
Power off the driver and
verify that the supply voltage
meets specifications.
a155
Inverter
power
module
overtemp
Major
The alarm
is
generated.
1. The fan is faulty.
2. The ambient temperature
exceeds the upper
threshold.
1. Replace the fan.
2. Power off and power on
after the ambient
temperature drops to a
proper level.
a156
Inverter
output U
overcurren
t
Major
The alarm
is
generated.
1. The driver output cable is
grounded.
2. The driver output cable
is short-circuited.
3. The fan is faulty.
1. Cut off the three-phase
power supply and check
whether the driver output
cable is grounded. See
a145 handling methods.
2. Cut off the three-phase
power supply and check
whether the driver output
cable is faulty. See the
a145 handling methods.
3. Replace the fan.
a157
Inverter
output V
overcurren
t
Major
The alarm
is
generated.
1. The driver output cable is
grounded.
2. The driver output cable
is short-circuited.
3. The fan is faulty.
1. Cut off the three-phase
power supply and check
whether the driver output
cable is grounded. See
a145 handling methods.
2. Cut off the three-phase
power supply and check
whether the driver output
cable is faulty. See the
a145 handling methods.
3. Replace the fan.
a158
Inverter
output W
overcurren
t
Major
The alarm
is
generated.
1. The driver output cable is
grounded.
2. The driver output cable is
short-circuited.
1. Cut off the three-phase
power supply and check
whether the driver output
cable is grounded. See