A flashing run light is not a fault code, but it is indicative of an issue with the fan. A flashing run light means that the fan has received a run command, but something is preventing it from actually being able to run.
A flashing run light is most commonly associated with fire alarm issues. MacroAir uses the S5 and SC terminals programmed normally closed for a fast stop, meant for use with a fire alarm system. When the terminals open, no fault code is shown like with other fan models; you will simply see the run light flashing. Older fans may use a normally open relay instead, so be sure to contact Macroair Technical Support to verify fire alarm programming on fans over 10 years old. Below are steps to troubleshoot fire alarm issues.
1. Orange and orange/white wires are not shorted together. For standard touchpads, MacroAir heatshrinks the two wires together inside the touchpad enclosure. For Controller 30s, the wires need to be twisted together by the installer. For AirLynk, a terminal block is located on the outside of the AirLynk panel with a jumper in it. If a fire alarm is not being used, ensure that one of these methods is being used. Refer to more information on fire alarm wiring here.
2. The wrong type of relay is being used. The relay must be normally-closed if the drive is programmed for normally closed, and vice versa.
3. The fire alarm has been activated and the relay is open (or closed for normally open). If a normally-closed relay is tied into the system, have someone from the fire alarm company ensure that the relay is in the correct closed position.
4. The CAT5 cable is out of spec or damaged. CAT5e shielded stranded minimum must be used. Replace any damaged or out of spec cable with the proper cable.
5. The incorrect CAT5 pinout is used. All of our CAT5 connections require a 568B pinout.
6. The orange and orange/white wires are not tied into the correct VFD terminals. Ensure that they are landed on S5 and SC.
7. The fire alarm wiring is tied between different model fans. You cannot use a fire alarm between different drive types, such as Schneider, Yaskawa, etc. There must be a separate relay for each drive type.
8. Noise/Electrical interference. The communication signal can degrade if the CAT5 is ran too close to the fan's incoming power or other high voltage (120VAC and up) wiring. Ensure that the CAT5 wiring is ran at least 6" away from any power wires. The further away, the better. Never run CAT5 and power wiring in the same conduit. CAT5 cannot be coiled and any excess must be cut or ran in a method that eliminates any coils.
9. Dip switch S3 is in the "SOURCE" position. It should always be in the "SINK" position. It is also possible for the switch to be stuck halfway between the two options, so ensure that it is all the way up in the SINK position.
10. There is an issue with the terminals. Contact MacroAir Technical Support to verify correct terminal function.
Aside from fire alarm issues, there are other possible causes of a flashing run light.
1. A run command was given, but not a speed. Ensure that a speed and a run command are given.
2. The analog remote is wired incorrectly.
3. The analog remote was in the Forward or Reverse position when the drive was powered on. Flip the switch to Off and back to the desired direction to resume operation.
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