RITE-HITE Rave RHC 1234567-001, Installation And Owner'S Manual

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RAVE ® FAN
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Pub. No. 54450034 Rev. 4 - © DECEMBER 2014
38
Pub. No. 54450034 Rev. 4 - © DECEMBER 2014
4. If the speed controller appears to be functioning properly, but the fan is not operating properly,
the VFD may not be receiving the proper signal. With a DMM, measure the voltage at each
corresponding VFD input:
I/O Check: Set fan to slowest speed (1 LED), Forward direction
If the proper voltage is present at the speed controller, but not at the VFD, a wiring error or
break in the cable is likely. Verify connections and test cable for continuity.
If the proper voltage is present at the VFD, but the VFD is not running at the commanded
speed (10 Hz, forward), a parameter setting may have been changed. Go to Step 6.
5. The speed controller uses three VFD inputs to select a preset speed. The actual speed value
(in Hz) corresponding to each preset speed is stored in the VFD parameters.
For example, when the speed controller displays six LEDs (Speed 6), it turns on input (Ll3).
When the VFD sees input Ll3 on, with inputs Ll2 and Ll4 off, it runs the fan at the speed stored
in parameter SP3 (52 Hz by default).
Rotational direction is determined by the Forward and Reverse signals. For the previous
example, the fan will run forward if VFD input Ll1 is on. If VFD input Ll5 is on, it will run in
reverse. If neither input is on, the fan will not operate.
Using a DMM, step through each of the seven speed settings and verify the proper input
states. Check for swapped wires if the input states do not match the following table.
TROUBLESHOOTING