Icon ZC0549 MC1648DLS treadmill belt motor won't start, red LED flashes. Motor starts when connected to 18v battery

Thread Starter

fdsjksdfkjd

Joined Aug 27, 2022
2
I have a Nordic Trac C990 treadmill with control board Icon ZC0549 (also says MC1648DLS on the heat sink), the belt motor won't start but the user interface starts up without error and the incline motor still works. When I initiate a workout session on the treadmill (the motor is supposed to start) the belt motor doesn't start, all I get is a flash red LED. When I stop/pause the workout the LED stops flashing. I tried connecting an 18v battery to the belt motor for a split second and the motor did start. I replaced the big 200v 1500uf capacitor (biggest cap in pic toward bottom) and that didn't fix the problem. I unplugged the motor from the control board in order to measure the voltage the control board was outputting and my meter said 148v DC.
Any idea what might be going on or what to try next? Should I try replacing the next biggest capacitor (400v, 120uf)?
 

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Thread Starter

fdsjksdfkjd

Joined Aug 27, 2022
2
By the way, the red LED provides a steady/consistent flash when a workout is started. From what I've read this usually indicates the controller board is receiving a speed signal from the console.
 
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