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RSMV Technical Guide
RSMV LCD SCREENS
Setpoint Status Screens and Alarms Screen
Alarms Screen
If an alarm is present, the ALARM LED above the LCD display will
light up red and blink. The Alarms will display and scroll automatically
from the ALARMS screen when alarms are present.
NO ALARMS:
This will be shown if there are no current alarms.
NO SUCTION PRESSURE SENSOR (SUCT) DETECTED:
This
alarm indicates the Suction Pressure Sensor is not detected by the
system. The system will shut down due to Unsafe Suction safety and will
retry after 5 minutes.
HIGH HEAD PRESSURE (HP) DETECTED:
This indicates a High
Head Pressure Alarm condition which is activated when the Head Pressure
rises above 550 psig. This will cause the condenser to go to 100%.
NO HEAD PRESSURE SENSOR (HEAD) DETECTED:
This alarm
indicates the Head Pressure Sensor is not detected by the system. This
will cause the condenser to go to 100%.
COIL TEMP A1 FAILURE:
This alarm will occur if the coil temperature
is not within operable range (below -32ºF or above 310ºF). This could be
the result of a bad sensor or faulty wiring. This alarm will shut down the
system. The system will reset after 5 minutes if the sensor is detected.
COIL TEMP A2 FAILURE:
This alarm will occur if the coil temperature
is not within operable range (below -32ºF or above 310ºF). This could be
the result of a bad sensor or faulty wiring. This alarm will shut down the
system. The system will reset after 5 minutes if the sensor is detected.
COMPRESSOR (COMP) A1 FAILURE:
This alarm will occur if the
compressor fails to run 45 seconds after the relay is activated or if the
signal is lost after activation. This will cause an alarm and will shut down
the compressor (relay). The system will retry after 5 minutes.
COMPRESSOR (COMP) A2 FAILURE:
This alarm will occur if the
compressor fails to run 45 seconds after the relay is activated or if the
signal is lost after activation. This will cause an alarm and will shut down
the compressor (relay). The system will retry after 5 minutes.
LOW SUPERHEAT 1 (SH1) DETECTED:
This alarm will be activated
when the Superheat is less than 4ºF for 2 minutes during normal operation
or for 4 minutes during the first 10 minutes. The system will shut down
and will retry after 5 minutes.
LOW SUPERHEAT 2 (SH2) DETECTED:
This alarm will be activated
when the Superheat is less than 4ºF for 2 minutes during normal operation
or for 4 minutes during the first 10 minutes. The system will shut down.
The system will shut down and will retry after 5 minutes.
HIGH SUPERHEAT 1 (SH1) WARNING:
If superheat is above 25ºF
for 2 minutes, this alarm will appear on the module only. It will not be sent
to the main controller to display on Prism 2.
HIGH SUPERHEAT 2 (SH2) WARNING:
If superheat is above 25ºF
for 2 minutes, this alarm will appear on the module only. It will not be sent
to the main controller to display on Prism 2.
HIGH SUPERHEAT 1 (SH1) FAILURE:
If superheat is above 30ºF
for 10 minutes, it will fail the compressors. It will retry after 5 minutes. If
it fails twice in 2 hours, it will lock out the compressors.
HIGH SUPERHEAT 2 (SH2) FAILURE:
If superheat is above 30ºF
for 10 minutes, it will fail the compressors. It will retry after 5 minutes. If
it fails twice in 2 hours, it will lock out the compressors.
HIGH SUPERHEAT LOCKOUT:
If the module fails on high superheat
twice in 2 hours, it will lock out the compressors.
LOW SUCTION PRESSURE (SP) DETECTED:
This alarm will
occur if suction pressure falls below the low suction pressure setpoint
for 20 seconds. The system will try to protect by lowering compressor
modulation percentage.
LOW SUCTION PRESSURE (SP) FAILURE:
This alarm will occur
if suction pressure stays below the low suction pressure setpoint for 1
minute or falls below 40 psi for 5 seconds. This alarm will shut down the
system. The system will retry after 5 minutes.
EBUS SLAVE (SLV) TIMEOUT:
This alarm indicates communication
has been lost between the RSMV and the main controller. This can be the
result of a bad cable, a missing cable, or the main controller or module
not being configured properly.
COPELAND VFD ALARM:
Indicates there is an alarm on the
Copeland VFD.
MODBUS MASTER COMM TIMEOUT:
Communications has
been lost between the RSM and the VFD that may be connected. This
can be the result of a bad cable, a missing cable, or the module not being
configured properly.
LOW SUCT
95 psi
LOW SUCTION PRESSURE SETPOINT SETTING
Default is 95 PSI.
COILT SP
40
º
F
COIL TEMPERATURE SETPOINT SETTING
Valid range is 35ºF to 70ºF. Default is 40ºF.
ALARMS
Summary of Contents for RSMV ASM01686
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