Compressor Shut-Down Sequence For High Or Low Refrigerant Pressure Fault; Overcurrent And Current Imbalance; Compressor Operating Outside Envelope; Over And Under Voltage - Rheem ECONET RP2024BJVCA Installation Instructions Manual

8.0 ACTIVE SYSTEM PROTECTION FEATURES
If there are 3 low pressure faults in the same call
for cooling or during 120 minutes of continuous
heating operation, the VSODC will lock the
compressor out and flash a 21L fault code and
the EcoNet Control Center will display a Low
TM
Refrigerant Pressure Lockout fault on the screen.
If the outdoor ambient is below -10°F [-23°C] in
the heating mode when the lockout occurs, the
control will automatically reset when the outdoor
ambient rises to -10°F [-23°C]. If the outdoor
ambient is above -10°F [-23°C], a manual reset
is required for the VSODU to exit the compressor
lock-out mode and clear the fault. This is
accomplished by disconnecting the electrical
power to both the indoor and outdoor units for 1
minute and then reconnecting power.
NOTE: If the system experiences a low
refrigerant pressure lock-out, the system
should be evaluated to determine the cause
for the low pressure condition and corrective
action taken to eliminate the cause. Possible
causes include low refrigerant charge, failed
indoor blower motor, dirty return air filter, or
a dirty indoor coil in the cooling mode or low
refrigerant charge, a failed outdoor motor, or a
dirty outdoor coil in the heating mode.
8.7 Compressor Shut-
Down Sequence for
High or Low Refrigerant
Pressure Fault
1. The compressor is commanded to operate at
zero (0) RPM for a minimum of 5 minutes.
2. The outdoor EXV will be directed to
completely close for a period of 5 minutes and
will then open up completely.
3. The outdoor fan motor will continue to operate
during the 5 minute compressor off delay.
4. The VSODC and EcoNet
display the applicable fault code.
5. If after 5 minutes cooling or heating demand
persists and the pressure has reached reset
conditions, normal system operation will
resume and the fault codes will be cleared
from the VSODC and EcoNet
displays.
6. If after 5 minutes cooling or heating demand
persists and the pressure has not reached
reset conditions, the outdoor fan motor will be
shut down. Once the pressure reaches reset
conditions after the 5 minute delay, normal
system operation will resume.
Control Center will
TM
Control Center
TM
8.8 Overcurrent and
Current Imbalance
If the compressor current exceeds an acceptable
level for the compressor or inverter, the inverter
will reduce the compressor speed to allow the
current to return to an acceptable level. If there
is a current imbalance between the compressor
3-phase windings, the inverter will shut the
compressor down for 5 minutes and will lock the
compressor out if there are 3 faults within a single
call for operation.
8.9 Compressor
Operation Outside
Envelope
If the inverter detects that the compressor
motor torque exceeds an acceptable level for
the compressor, the inverter will reduce the
compressor speed to keep the torque at an
acceptable level.
8.10 Over and Under
Voltage
If the supply voltage or internal DC voltage is not
within an acceptable operating range, the inverter
will shut the compressor off until the voltage
returns to an acceptable level.
8.11 Inverter Over
Temperature
If the internal inverter temperature sensors detect
excessive temperatures within the inverter, the
inverter will reduce the speed of the compressor or
shut the compressor down until the temperatures
drop to an acceptable level. The compressor will
be locked out if there are 3 faults within a single
call for operation.
8.12 Controls and
Communication
Malfunction
If the controls senses a malfunction within the
control system or communications or if system
model data is not available, the controls will act
to shut the system down to prevent the system
from operating at a condition that could harm
components.
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