Setting The Ambient Temperature; Ol2 Characteristics At Low Speed - YASKAWA Varispeed E7 Instruction Manual And Parameter Description

Setting the Ambient Temperature

The overload capability of the inverter depends on the ambient temperature. At ambient temperatures higher
than 45°C (40°C for IP20/NEMA1 types) the output current capacity is reduced, i.e. the OL2 alarm level will
be lowered.
Related Constants
Con-
stant Name
Number
L8-12 Ambient temperature
The ambient temperature must be set in constant L8-12.

OL2 Characteristics at Low Speed

At output frequencies below 6 Hz the overload capability of the inverter is lower than at higher speeds, i.e. an
OL2 fault (inverter overload) may occur even if the current is below the normal OL2 current level (see
6.34).
Related Constants
Con-
stant Name
Number
OL2 characteristics selection at
L8-15
low speeds
Generally it is not recommended to disable this function. Otherwise the inverter life time might be shortened.
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Description
Sets the ambient temperature.
OL2 Alarm-Level
Fig. 6.34 OL2 Alarm Level at Low Frequencies
Description
0: OL2 characteristics at low speeds disabled.
1: OL2 characteristics at low speeds enabled.
Inverter Protection
Change
Setting Factory Access
during
Range Setting Level
Operation
45 to 60 45 °C No
Change
Setting Factory Access
during
Range Setting Level
Operation
0 or 1 1 No
A
Fig.
A
49
6-