DC volts low, speed limiting. Supply voltage is under 197 V, or a loose wire or the inverter is limiting compressor speed. The table does not list a reset time.
Carrier 65 is DC-volts low, speed limiting. The manual's voltage on this row is supply under 197 V. Causes are that low supply, a loose wire in the control box, and internal inverter damage. It is not brownout 46, which uses approximately 180 V. Code 65 has no reset time in the table. The actions are to check supply voltage and call the utility if it is low, find the loose wire, or replace the inverter.
Likely causes
- Low supply line voltage, under 197 V
- Loose wire in the control box
- Inverter internal damage
Safe checks for 65
- Count 6 short flashes and 5 long flashes. Do not use code 46's approximately 180 V figure on this row. This row says under 197 V
- Techniciancheck supply voltage to the outdoor unit and contact the utility if it is low. Check for a loose wire in the unit. Replace the inverter if the damage is internal
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician. Measuring line voltage at the outdoor unit is not a homeowner check.
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Multimeter for appliance and HVAC diagnosis: guide
In this code: Low supply line voltage, under 197 V
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