CHF100A series high performance universal inverter
.98.
Fault
Code
Fault Type
Reason
Solution
UV
DC bus
Under-voltage
1
.
Open phase occurred with
power supply.
2
.
Momentary power loss
occurred
3
.
Wiring terminals for input
power supply are loose.
4
.
Voltage fluctuations in
power supply are too large.
Inspect the input power
supply or wiring.
OL1
Motor overload
1. Motor drive heavy load at
low speed for a long time.
2. Improper V/F curve
3. Improper motor
’
s overload
protection threshold (PB.03)
4. Sudden change of load.
1. Select variable
frequency motor.
2. Check and adjust
V/F curve.
3. Check and adjust
PB.03
4. Check the load.
OL2
Inverter
overload
1. Load is too heavy or
Acc/Dec time is too short.
2. Improper V/F curve
3. Capacity of inverter is too
small.
1. Increase Acc/Dec
time or select bigger
capacity inverter.
2. Check and adjust
V/F curve.
3. Select bigger
capacity inverter.
SPI
Input phase
failure
1
.
Open-phase occurred in
power supply.
2
.
Momentary power loss
occurred.
3. Wiring terminals for
input power supply are
loose.
4
.
Voltage fluctuations in
power supply are too large.
5
.
Voltage balance between
phase is bad.
Check the wiring,
installation and power
supply.
Summary of Contents for CHF100A-004G-2
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