Active Compressor Protection Mode - Rheem R-410A Installation Instructions Manual

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The ICC starts/stops the outdoor fan one (1) second after the start/stop of the compressor
•
upon a call for compressor operation to minimize current inrush and/or voltage drop.
13.X Active Compressor Protection Mode

12.10 Active Compressor Protection Mode

• The ICC actively protects the compressor from harmful operation during a fault
The ICC actively protects the compressor from harmful operation during a fault condition.
condition.
•
When the ICC detects a condition that could damage the compressor, the ICC will enter
• When the ICC detects a condition that could damage the compressor, the ICC will
•
active protection mode and lockout compressor operation
enter active protection mode and lockout compressor operation
The condition causing active protection must be resolved then the ICC can be reset to restart
• The condition causing active protection must be resolved then the ICC can be
•
the system. reset to restart the system.
There are five (5) active protection modes:
• There are five (5) active protection modes:
•
1 1 ) ) L L o o w w P P r r e e s s s s u u r r e e C C o o n n t t r r o o l l L L o o c c k k o o u u t t
1) Low Pressure Control Lockout
• The ICC will display a flashing "L" followed by a flashing 21 when a low pressure
The ICC will display a flashing "L" followed by a flashing 21 when a low pressure
control lockout occurs.
•
control lockout occurs.
• The ICC addresses low pressure control faults differently depending on the mode
The ICC addresses low pressure control faults differently depending on the mode of unit
of unit operation (cooling or heating mode).
•
operation (cooling or heating mode).
Active Protection – Code L21 – Open low pressure control
Active Protection – Code L21 – Open low pressure control
C C o o o o l l i i n n g g M M o o d d e e
• If the LPC opens three (3) times during the same call for cooling operation, the
Cooling Mode
ICC will lockout the compressor to keep it from continuing to operate and flash a
If the LPC opens three (3) times during the same call for cooling operation, the ICC will
L" on the dual 7-segment LEDs followed by a "21".
•
lockout the compressor to keep it from continuing to operate and flash a L" on the 7-
I I M M P P O O R R T T A A N N T T : : This mode of active protection must be manually reset.
segment LEDs followed by a "21".
H H e e a a t t i i n n g g M M o o d d e e
• There are two scenarios that will cause active protection during a LPC trip when
the unit is in the heating mode:
A A c c t t i i v v e e P P r r o o t t e e c c t t i i o o n n w w i i t t h h h h a a r r d d l l o o c c k k o o u u t t : :
If the LPC opens three (3) times within 120 minutes for the same call for heating
operation, the ICC will lockout the compressor to keep it from continuing to oper-
ate and flash a "L" on the dual 7-segment LEDs followed by a "21".
I I M M P P O O R R T T A A N N T T : : This mode of active protection must be manually reset.
A A c c t t i i v v e e P P r r o o t t e e c c t t i i o o n n w w i i t t h h s s o o f f t t l l o o c c k k o o u u t t : :
If the LPC opens three (3) times for the same call for heating and the outdoor
ambient temperature is below 5F, the ICC will lockout the compressor to keep it
from continuing to operate and flash a "L" on the dual 7-segment LEDs followed
by a "21". Once the outdoor ambient rises above 5F the ICC will clear active pro-
tection automatically.
I I M M P P O O R R T T A A N N T T : : This mode of active protection will automatically deactivate once
the outdoor temperature rises above 5F. Wait until the outdoor ambient tempera-
ture rises above 5F before performing further diagnostics.
2 2 ) ) H H i i g g h h P P r r e e s s s s u u r r e e C C o o n n t t r r o o l l L L o o c c k k o o u u t t
• If the HPC opens three (3) times during the same call for unit operation, the ICC
will lockout the compressor to keep it from continuing to operate and flash a L" on
the dual 7-segment LEDs followed by a "29".