24VNA6 / 25VNA4 seriesCarrier 82 fault code (24VNA6 / 25VNA4)

VFD Line Current Speed Reduction; VFD Reset with Power Dropout; VFD Shutdown with Power Dropout; Low Voltage Shutdown; High Voltage Shutdown

1. Code 82-11 VFD System Fault - Line Current Lim

   The VFD monitors input current and will limit or reduce compressor speed if the current rises above threshold. Current limits are model specific. While code 82-11 is active the VFD will continue to operate compressor at a reduced or limited speed, while fan operation will not be affected directly. This code will clear once VFD input current drops below threshold. Low input voltage combined with high load is the most likely cause of this code. Check system for overcharge and indoor/outdoor coil blockage as well as input voltage.

   24VNA6-25VNA4-1SM, p. 21

2. Code 82-13 VFD Reset with Power Dropout / Code 82-53 VFD Lockout - Reset with Power Drop

   This code indicates the VFD has reset itself due to a line voltage loss. When this code is set the PCM will complete a shutdown, reset the VFD, and restart if demand is still present. The system should resume operation after the 5 minute compressor protection time delay expires. 3 occurrences of code 82-13 within a 1 hour period will result in a code 82-53 and 2 hour lockout. Occasional occurrences of this code may happen due to momentary power loss or electrical noise from utility. Check tightness of all line voltage connections. Loose connections can cause momentary voltage drop due to vibration and trigger this fault. If all connections are tight, additional steps involving the local power utility or addition of external power conditioner may be required.

   24VNA6-25VNA4-1SM, p. 21

3. Code 82-15 VFD Fault with Power Dropout / Code 82-55 VFD Lockout - Fault with Power Drop

   This code indicates the VFD has shutdown due to a line voltage loss. When this code is set the PCM reset the VFD, and restart if demand is still present. The system should resume operation after 5 minute compressor protection time delay expires. 4 occurrences of code 82-15 within a 1 hour period will result in a code 82-55 and 2 hour lockout. Occasional occurrences of this code may happen due to momentary power loss or electrical noise from utility. This code can be paired with other codes if electrical noise is present. Check tightness of all line voltage connections. Loose connections can cause momentary voltage drop due to vibration and trigger this fault. If all connections are tight, additional steps involving the local power utility or addition of external power conditioner may be required.

   24VNA6-25VNA4-1SM, p. 21

4. Code 82-16 VFD System Fault - Low Line Volt / Code 82-56 VFD System Lockout - Low Line Volt

   The VFD monitors line voltage and will set code 82-16 if line voltage drops below 180VAC peak. When code 82-16 occurs the system will shut down and reset VFD. System will attempt to resume operation once 5 minute compressor protection timer expires. 4 occurrences of code 82-16 in a 1 hour period will result in code 82-56 and will shut down equipment for a 2 hour lockout. Measure input voltage with a power quality analyzer and contact power utility provider if necessary.

   24VNA6-25VNA4-1SM, p. 22

5. Code 82-17 VFD System Fault - High Line Volt / Code 82-57 VFD System Lockout - High Line Volt

   The VFD monitors line voltage and will set code 82-17 if line voltage rises above 410VAC peak. When code 82-17 is occurs the system will remain operating as it is likely caused by a momentary voltage spike that will not damage the VFD. If a long term unsafe high voltage event occurs, the PCM will generate a 15-94 and shut down equipment. 10 events of code 82-17 in a 1 hour period will result in code 82-57 and will shut down equipment for a 2 hour lockout. Measure input voltage with a power quality analyzer and contact power utility provider if necessary.

   24VNA6-25VNA4-1SM, p. 22