Elevation Inverter Error Code List

1 Preliminary Requirements

1.1 Tools and Test Equipment

No tools or test equipment required

1.2 Consumables

No consumables required

1.3 Replacement Parts

No replacement parts required

1.4 Safety

warning

Injury may occur !
If any of the protective functions have been activated, first remove the cause. then, after checking that the all run commands are set to off, reset the alarm. note that if the alarm is reset while any run commands are set to on, the inverter may supply the power to the motor which may cause the motor to rotate.

warning

Electric shock may occur !
⋄ Even though the inverter has interrupted power to the motor, if the voltage is applied to the main circuit power input terminals L1/R, L2/S and L3/T (L1/L and L2/N for single-phase voltage input), voltage may be output to inverter output terminals U, V, and W.⋄ Some electric charge may remain in the DC bus capacitor even after the power is turned off. Therefore, it may take some time until the DC link circuit voltage reaches a safe level. Before touching the circuit, wait for at least five minutes after the power has been turned off and check that the DC voltage between main circuit terminals P (+) and N (-) is less than +25 VDC using a multi-meter.

1.5 Required Conditions

No required conditions

2 Procedure

1. Check whether an alarm code is displayed on the LED monitor.

Table 1. Quick Reference Table of Alarm Codes
Name	Alarm Code	Problem		Possible Causes	What to Check and Suggested Measures
Over-current Protection	OC1	Over-current occurred during acceleration.	The inverter output current momentarily exceeded the over-current level.	The inverter output terminals were short-circuited.	Remove the wires connected to the inverter output terminals (U, V, and W) and measure the interphase resistance. Check if the resistance is too low.
	OC2	Over-current occurred during deceleration
	OC3	Over-current occurred when running at a constant speed
Over-voltage Protection	OU1	Over-voltage occurs during the acceleration	The DC link circuit voltage was over the detectin level of over-voltage.	The power supply voltage was over the range of the inverter's specifications.	Measure the input voltage. ⇒ Decrease the voltage to within that of the specifications.
	OU2	Over-voltage occurs during the deceleration
	OU3	Over-voltage ccurs during the running at constant speed
Under-voltage Protection	LU	The DC link circuit voltage was below the under-voltage detection level		The power supply voltage did not reach the range of the inverter's specifications.	Measure the input voltage. ⇒ Increase the voltage to within that of the specifications.
Input Phase Loss Protection	L in	Input phase loss occurred, or interphase voltage unbalance rate was large.		Main circuit power input wires broken.	Measure the input voltage. ⇒ Repair or replace the wires.
Input Phase Loss Protection	L in			The terminal screws for the main circuit power input of the inverter were not tight enough.	Check if the screws on the inverter input terminals have become loose. ⇒ Tighten the terminal screws to the recommended torque.
Output Phase Loss Protection	OPL	Output phase loss occurred.		The terminal screws for inverter output were not tight enough.	Check if any scew on teh inverter output terminals has become loose. ⇒ Tighten the terminal screws to the recommended torque.
Overheat Protection for Heat Sink	OH1	Temperature around heat sink rose.		Temperature around the inverter exceeded that of inverter specifications.	If the temperature around the inverter is normal, replace the inverter.
Overheat Protection for Heat Sink	OH1	Temperature around heat sink rose.		Air vent is blocked.	Check if the heat sink is not clogged. ⇒ Clean the heat sink.
Overload Protection	OLU	Temperature inside inverter rose abnormally.		Temperature around the inverter exceeded that of inverter specifications.	If the temperature around the inverter is normal, replace the inverter.
Overload Protection	OLU	Temperature inside inverter rose abnormally.		Air vent is blocked.	Check if the heat sink is not clogged. ⇒ Clean the heat sink.
note: An under bar ( _ _ _ _ ) will be displayed when an under-voltage condition is detected and a run command is present while the setting of F14 (Restart mode after instantaneous power failure (function selection )) is not ”0”.

3 Finalization

No finalization steps