Section 7 Blower Start Fault
• This means the Carel controller told the AMU and Exhaust VFDs to run, but the VFDs didn’t send a signal back saying they’re running. • VFD may be faulted – check display on VFD to determine fault code, then check VFD manual to decipher fault code. • Fuses to VFD may be faulted – pull fuses from holder and check for continuity • Overloads on the downstream side of the exhaust VFD (for individual motor protection) may be faulted. Press reset button, then measure amps to ensure motor is not overloaded.
VFD Display
VFD Fuses
Exhaust Fan Overloads
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