35
b. When motor runs with low speed, the capacity to dissipate heat is not as good as motor running
with rated frequency. The level to energize the electronic thermal relay should be adjusted
accordingly. [Please refer to Fig. 4. Curve (1) should be adjusted to curve (2).] To protect the
motor, select appropriate settings of Fn_05 & Fn_69 according to the specifications of motor.
(refer to Fig 1, 2, 3)
c. When Fn_69 = xx0x, Fn_05 = 18, set Fn_37 to the rated frequency of motor.
d. Fn_69 = 0xx0 : After electronic thermal motor protection is energized, inverter baseblocks
immediately and dispalay inks “OL1:” To start the inverter, it is necessary
to press RESET key or turn on the remote control RESET terminal.
Fn_69 = 1xx0 : After electronic thermal motor protection is energized, inverter continues running
and display starts blinking “OL1” until current is lower than 103% or 113%
rating (depending on Fn_69).
2. The functions of electronic thermal inverter protection are as follows.
a. Inverter continues running when current is under 110% rating; inverter runs for one minute only
when current is at 150% rating.
b. Fn_71 = xxx0 : After electronic thermal inverter protection is energized, inverter baseblocks
immediately and display blinks “OL2”. To start the inverter, it is necessary to
press RESET key or turn on the remote control RESET terminal.
Fn_71 = xxx1 : After electronic thermal inverter protection is energized, inverter continues
running and display start blinking “OL2” until current is lower than 110% rating.
derating derating derating
60
6
Hz
100
%
60
20
Hz
100
%
60
20
Hz
100
%
90
50
60
90
FIG. 1
FIG. 2
FIG. 3
Fn_69 = xx1x
Fn_69 = xx0x, Fn_05 = 0-8 Fn_69 = xx0x, Fn_05 = 9-17
special motor for inverter
50 Hz standard motor 60 Hz standard motor
