186CNV / 284ANV: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
20
Code 61-41 RVS Open Lockout
Applies to HP only. Reversing valve is required to be energized for
cooling operation, and for defrosting during heating operation, therefore
the system will declare 61-41 when it senses the reversing valve coil is
"open" or infinite resistance, and not operational. This check can only be
performed when the reversing valve is not energized so it is possible that
a reversing valve coil failure during the cooling season may not be
identified since the reversing valve continues to be powered between
cooling cycles. In this case the system will not declare a fault but the
reversing valve will be in the heating position.
Remove RVS connector from PCM and measure continuity between
pins 1 & 3. If open or shorted, inspect wire for damage and repair if
necessary. If no damage is found, replace coil and harness.
Code 62-01 PEV Solenoid Open
PEV (pressure equalization valve) is used to equalize pressures across
the compressor prior to starting in order to ensure the compressor can
align itself and start will minimal effort. The system will declare 62-01
when it senses the PEV coil is "open" or infinite resistance. The system
will continue to operate while this fault is active as long as the pressures
are within acceptable range prior to start attempt. If not, the system will
not start until pressure differential drops to acceptable range.
Remove PEV connector from PCM and measure continuity between
pins 1 & 3. If open, inspect wire for damage and repair if necessary. If no
damage is found, replace coil and harness.
Code 64-41 EXV-H Phase Open Lockout
Applies to HP only. EXV-H is required to control superheat in heating
mode. Each time power is applied to outdoor unit the EXV-H will
operate to a known position as the valve does not have the capability to
feedback actual position. The PCM software must know the starting
point and then count as EXV stepper motor is pulsed. At the end of each
cycle the valve will close to help maintain pressure differential and
optimize cyclic efficiency. HP units will not operate if this fault is active
because the valve position at time of failure is unknown.
This code occurs when the PCM determines the resistance of the stepper
motor coil circuit is above the maximum value to properly function.
Inspection of the wire harness and plug should be performed, as well as
using multimeter to confirm "open" continuity between pins. If nothing
is found, replace coil and harness assembly.
Code 64-44 EXV-H Power Shorted Lockout
Applies to HP only. EXV-H is required to control superheat in heating
mode. Each time power is applied to the unit, the EXV-H will operate to
a known position as the valve does not have the capability to feedback
actual position. The PCM software must know the starting point and
then count when stepper motor is pulsed. At the end of each cycle the
valve will close to help maintain pressure differential and optimize
cyclic efficiency. HP units will not operate if this fault is active because
the valve position at time of failure is unknown.
This code occurs when the PCM determines the EXV power supply is
drawing excessive current. The most likely cause of this fault is the wire
attached to pin 1 of EXV-H connector being shorted to ground.
Inspection of the wire harness and plug should be performed, as well as
using multimeter to confirm "short to ground" continuity. If nothing is
found, replace coil and harness assembly.
Code 64-45 EXV-H Phase Shorted Lockout
Applies to HP only. EXV-H is required to control superheat in heating
mode. Each time power is applied to the unit, the EXV-H will operate to
a known position as the valve does not have the capability to feedback
actual position. The PCM software must know the starting point and
then count when stepper motor is pulsed. At the end of each cycle the
valve will close to help maintain pressure differential and optimize
cyclic efficiency. HP units will not operate if this fault is active because
the valve position at time of failure is unknown.
This code occurs when the PCM determines the EXV power supply is
drawing excessive current. The most likely cause of this fault is one or
more wires attached to pins 2-5 of EXV-H connector being shorted to
ground. Inspection of the wire harness and plug should be performed, as
well as using multimeter to confirm "short to ground" continuity. If
nothing is found, replace coil and harness assembly.
Code 65-41 EXV-VI Phase Open Lockout
Applies to 5T AC and HP only. EXV-VI is required to operate the vapor
injection circuit which is used in high demand situations such as high
ambient cooling or low ambient heating. Once per day the EXV-VI will
test itself by operating to a known position as the valve does not have the
capability to feedback actual position. The PCM software must know the
starting point and then count when stepper motor is pulsed. The valve
will remain closed until additional capacity is needed.
This code occurs when the PCM determines the resistance of the stepper
motor coil circuit is above the maximum value to properly function.
Inspection of the wire harness and plug should be performed, as well as
using multimeter to confirm "open" continuity between pins. If nothing
is found, replace coil and harness assembly.
Code 65-44 EXV-VI Power Shorted Lockout
Applies to 5T AC and HP only. EXV-VI is required to operate the vapor
injection circuit which is used in high demand situations such as high
ambient cooling or low ambient heating. Once per day the EXV-VI will
test itself by operating to a known position as the valve does not have the
capability to feedback actual position. The PCM software must know the
starting point and then count when stepper motor is pulsed. The valve
will remain closed until additional capacity is needed.
This code occurs when the PCM determines the EXV power supply is
drawing excessive current. The most likely cause of this fault is the wire
attached to pin 1 of EXV-H connector being shorted to ground.
Inspection of the wire harness and plug should be performed, as well as
using multimeter to confirm "short to ground" continuity. If nothing is
found, replace coil and harness assembly.
Code 65-45 EXV-VI Phase Shorted Lockout
Applies to 5T AC and HP only. EXV-VI is required to operate the vapor
injection circuit which is used in high demand situations such as high
ambient cooling or low ambient heating. Once per day the EXV-VI will
test itself by operating to a known position as the valve does not have the
capability to feedback actual position. The PCM software must know the
starting point and then count when stepper motor is pulsed. The valve
will remain closed until additional capacity is needed.
This code occurs when the PCM determines the EXV power supply is
drawing excessive current. The most likely cause of this fault is one or
more wires attached to pins 2-5 of EXV-H connector being shorted to
ground. Inspection of the wire harness and plug should be performed, as
well as using multimeter to confirm "short to ground" continuity. If
nothing is found, replace coil and harness assembly.
Code 66-41 VFD Control Relay Open Lockout
The PCM commands the VFD to close a relay in the power circuit
during VFD initialization. If PCM senses the VFD relay coil is open this
code is set. While this code is active the VFD will not be powered and
system is inoperable. 12VDC is fed from Pins 6&7 of the PCM into pins
5&6 at the VFD via communication cable as long as system is ready to
run (other faults that stop system from operation are not activ
e).
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