Note: Since “cmmo-st-c5-1-diop” does not match a standard commercial HVAC, chiller, or VFD model from major brands (Carrier, Trane, Daikin, Mitsubishi, York), this post treats it as a (possibly a chiller module, PLC, or OEM board). I have written the post to be useful for technicians encountering an unknown or legacy error code system.
Don’t assume “CMMO-ST-C5-1-DIOP” is the primary controller. In some chillers, it’s only an . The main error codes may be displayed on a different panel (e.g., a Carel or Danfoss controller). Trace the comms cable – you might find the real brain of the system. cmmo-st-c5-1-diop error codes
You send the "Enable" signal (DIN 4 = High), but the RDY output remains Low. The FLT LED is off. In some chillers, it’s only an
Monitoring of the 24V load and logic supply. Temperature: Overheating of the power output stage. You send the "Enable" signal (DIN 4 =