Hitachi SJ7002 Series Instruction Manual page 221

Sj7002 series
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Low Cooling Fan
The inverter monitors the heat sink cooling fan speed to help prevent overheating. If the speed
of the fan(s) decreases to 75% or less of full speed, output [WAF] Low Cooling Fan Speed
Speed
turns ON. Note that if you set parameter B092 Cooling Fan Control = 01 (Fan ON only during
RUN), the inverter will not output the [WAF] signal when the cooling fan is stopped.
40
Opt. Code
If the [WAF] signal turns ON during operation, first check the cooling fan inlet for clogging by
[WAF]
Symbol
dust and debris. If the air circulation path is clear, the fans may need replacement. You may also
[11 to [15],
Valid for
use monitor parameter D022 at the digital operator to monitor the status of fan speed.
Outputs
[ALx]
Required
B092
Settings
Monitor
D022
Settings
Default
Requires
config.
terminals
Starting Contact
The inverter generates [FR] Starting Contact Signal to correspond with Run (FW or RV) input
Signal
commands. The source of the Run command does not matter (so the A002 setting is ignored). If
both FW and RV inputs are ON, the inverter stops motor operation and turns OFF the [FR]
output. The [FR] signal is useful for external devices that need a traditional starting contact
41
Opt. Code
signal to coordinate operation with the inverter.
[FR]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
none
Settings
Default
Requires
config.
terminals
Heatsink
The inverter monitors its heatsink temperature to detect overheating. You can use parameter
Overheat
C064, Heatsink Overheat Warning Level, to set the over-temperature threshold for the heatsink
in degrees C. The inverter will turn ON intelligent output [OHF] Heatsink Overheat Warning if
Warning
the heatsink temperature exceeds the value in parameter C064.
42
Opt. Code
[OHF]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
C064
Settings
Default
Requires
terminals
config.
Forward command
Reverse command
Starting Contact Signal [FR]
4–59
SJ700
Inverter
2

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