Hitachi SJ7002 Series Instruction Manual page 220

Low Cooling Fan
Speed
Opt. Code
[WAF]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
Settings
Monitor
Settings
Default
Requires
config.
terminals
Starting Contact
Signal
Opt. Code
Symbol
[11 to [15],
Valid for
Outputs [ALx]
Required
Settings
Default
Requires
config.
terminals
Heatsink
Overheat
Warning
Opt. Code
[OHF]
Symbol
[11 to [15],
Valid for
[ALx]
Outputs
Required
Settings
Default
Requires
config.
terminals
Clearwater Tech - Phone: 800.894.0412 - Fax: 208.368.0415 - Web: www.clrwtr.com - Email: info@clrwtr.com
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
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
If the [WAF] signal turns ON during operation, first check the cooling fan inlet for clogging by
dust and debris. If the air circulation path is clear, the fans may need replacement. You may also
use monitor parameter D022 at the digital operator to monitor the status of fan speed.
B092
D022
The inverter generates [FR] Starting Contact Signal to correspond with Run (FW or RV) input
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
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signal to coordinate operation with the inverter.
[FR]
none
Starting Contact Signal [FR]
The inverter monitors its heatsink temperature to detect overheating. You can use parameter
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
the heatsink temperature exceeds the value in parameter C064.
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C064
Forward command
Reverse command
4–59
SJ700 Inverter
2