Mammoth Fans COMMERCIAL II SERIES |
19
18
TROUBLESHOOTING
TROUBLESHOOTING
Code
Desc.
Reason
Solution
E. iLF
Input
missing
phase
Loosening of main circuit
terminal of controller
Tighten the screw and restart
Excessive input voltage
fluctuations
Improve the power supply to meet the rated voltage
of the controller. If the main circuit power supply is
fine, check the main circuit side of the electromagnetic
contactor to identify the problem
Three-phase voltage
imbalance
Confirm if there is a problem with the input voltage
and improve the power imbalance
Code
Desc.
Reason
Solution
E. oLFxx
Output
missing
phase
Controller output side
U/V/W/ phase break
Check that the motor U/V/W/ phase connection is
normal and check that the controller output terminal
screw is not loose
Motor damage
Measure the resistance between the motor wires, and
replace the motor immediately if it is connected
Low motor power
Reset controller or motor power
Code
Desc.
Reason
Solution
E. oL2
Controller
Overload
Overload
Reduce load
Increase the curve coefficient of overload protection of
motor
Acceleration and deceleration
time too short
Increase F01.22 F01.23 (acceleration and deceleration
time) Decrease F04.01 (torque increase)
Torque lift set too large
Decrease F04.01 (torque increase)
V/F curve setting is not
appropriate
To determine the relationship between voltage and
frequency of V/F curve setting, modify F04.00
(VF curve setting) and modify the custom V/F curve
related parameters (F04.10~F04.19)
Abnormal output current due to
input missing phase
Check the main loop to remove input phase
Code
Desc.
Reason
Solution
E. oL1
Motor
overload
Overload
Reduce the load and increase the curve coefficient of
overload protection
Acceleration and deceleration
time set too small
Increase F01.22,F01.23
(acceleration and deceleration time)
Torque lift set too large
Decrease F04.01 (torque increase)
V/F curve setting is not
appropriate
To determine the relationship between voltage and
frequency of V/F curve setting, modify F04.00
(VF curve setting) and modify the custom V/F curve
related parameters (F04.10~F04.19)
The characteristics of
electronic thermal relay are
inconsistent with the
characteristics of motor load.
Use of external thermal relays
Abnormal output current
due to input missing phase
Check the main loop to remove input phase
Code
Desc.
Reason
Solution
E. oH2
IGBT
module
overheating
Excessive ambient temperature
Reduce the ambient temperature of the controller
Overload
Reduce load
Decrease F01.40 (carrier set)
Fan fault
Make sure that the fan is running normally.
If not, replace the fan and start up again
