186CNV / 284ANV: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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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.
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.
Code 83-11 VFD Compressor Fault - Current 1
Code 83-12 VFD Compressor Fault - Current 2
The VFD monitors multiple compressor current conditions and will limit
or reduce compressor speed if the current rises above threshold. Current
limits are model specific. While codes are active the VFD will continue
to operate compressor at a reduced or limited speed, and fan operation
will not be affected directly. This code will clear once compressor
current drops below threshold. This code indicates the compressor may
have minor damage and requires slightly higher torque (current) to
operate at desired rpm. If damage continues to worsen the compressor
may cause code 83-15, 83-55, 83-16, and 83-56. Check system for
overcharge and indoor/outdoor coil blockage as well as input voltage.
Listen to compressor during operating for abnormal noise indicating
physical damage. If code persists or compressor has abnormal noise,
replace compressor.
Code 83-15 VFD Compressor Fault - Current 3
Code 83-55 VFD Compressor Lockout - Current 3
Code 83-16 VFD Compressor Fault - Current 4
Code 83-56 VFD Compressor Lockout - Current 4
The VFD monitors multiple compressor current conditions and will limit
or reduce compressor speed if the current rises above threshold. Current
limits are model specific. Code 83-15, 83-16, 83-55, and 83-56 will
result if the VFD is not capable of reducing compressor speed far enough
or fast enough while running. This code will shut down system and
attempt restart after 5 minute compressor protection timer has expired. 2
instances of code 83-15/83-16 in a 4 hour period will result in code
83-55/83-56 and a 2 hour lockout. These codes indicate the compressor
requires higher torque (current) to operate at desired rpm. Check system
for overcharge and indoor/outdoor coil blockage as well as input voltage.
Check wiring from VFD to compressor for poor connections causing
high current. Check compressor winding resistance against table. Listen
to compressor during operating for abnormal noise indicating physical
damage. VFD may have internal damage causing high current, or
compressor may be damaged.
Code 83-57 VFD Compressor Lockout - Current 1
This code will be set when any of the VFD compressor speed limiting
codes are active and the compressor speed is reduced below the lowest
allowable operating speed for a given OAT. Once 1 hour lockout timer
expires the unit will attempt to resume operation. This code indicates the
compressor requires higher torque (current) to operate at desired rpm
and compressor is mechanically damaged. If code persists, replace
compressor.
Code 84-11 VFD Overtemp Limiting
Code 84-58 VFD Overtemp Lockout
The VFD has internal temperature sensors to monitor critical power
components and take action if operating temperatures cross thresholds
that may shorten the VFDs operating life. If the heat sink temperature
sensor fails, it will no longer be capable of preventing critical power
components from operation above the safe reliable temperature
threshold. If this fault is active, the VFD will shut down compressor but
continue to operate fan to draw air across heat sink. Once heat sink
temperature is acceptable, system will restart but reduce demand by 25%
for each occurrence of 84-11. Once speed can no longer be reduced
further, code 84-58 will be set and system locked out for 2 hours. Each
hour of operation without additional code 84-11 will allow increased
demand of 25%. The most likely cause is restricted airflow over heat
sink. Inspect and clear heatsink of anything that may inhibit airflow or
contact with air. A less likely possibility is inadequate contact of power
components with heat sink, not allowing intended heat transfer between
components and heat sink. If clearing heatsink of blockage does not
eliminate codes, replace VFD.
Code 85-13 VFD System Fault - DC Under Voltage
Code 85-53 VFD System Lockout - DC Under Volt
The VFD boosts line voltage and uses the PFC circuit to maintain DC
voltage within an acceptable range. Code 85-13 is set when the DC
voltage is lower than the acceptable lower limit of 180VDC. Attempting
to operate VFD below minimum DC voltage can cause failed/reduced
compressor or fan operation. 4 occurrences within 1 hours result in
85-53 malfunction which has a 2 hour lockout time. An instance of
85-13 will result in VFD shutdown and system restart once 5 minute
compressor protection timer expires. Low AC line voltage, quickly
loading the compressor, or a damaged PFC circuit in VFD may result in
a code 85-14. Check to ensure reactors are plugged in securely.
Manually power cycle outdoor unit with disconnect, if malfunction
persists replace reactors, then VFD.
Code 85-14 VFD System Fault - DC Over Voltage
Code 85-54 VFD System Lockout - DC Over Volt
The VFD boosts line voltage and uses the PFC circuit to maintain DC
voltage within an acceptable range. Code 85-14 is set when the DC
voltage exceeds the acceptable upper limit of 410VDC. Exceeding
maximum DC voltage can damage electrical circuits or shorten VFD's
operating life. 4 occurrences within 1 hours result in 85-54 malfunction
which has a 2 hour lockout time. An instance of 85-14 will result in VFD
shutdown and system restart once 5 minute compressor protection timer
expires. High AC line voltage or quickly unloading the compressor may
result in a code 85-14. Manually power cycle outdoor unit with
disconnect, if malfunction persists replace VFD.
