112 ● gForce Ultra User Manual 10-2014
programmed reset times, the compressor will be locked-out until the low suction
pressure alarm is no longer exist and alarm message is manually reset on dap4™.
This logic is similar to the existing high pressure alarm lock-out.
If discharge temperature is installed, use low discharge temperature setpoint to
turn off compressor when the discharge temperature goes below this setpoint.
Monitor EEV’s critical alarms and shut down the compressor until the alarm is
clear. Add 60 seconds delay before registering the alarm. Display the EEV driver
failure alarm messages on dap4™. Add these alarms to the alarm list and BMS
point list. After these alarms are clear, reset the compressors.
Low suction temperature (C1)
EEPROM damaged (C1, C2)
Sensor S1
Sensor S2
Sensor S3
Sensor S4
EEV motor error (C1 C2)
LOP (low evaporation temperature) (C1)
MOP (high evaporation temperature) (C1)
LowSH (low superheat) (C1)
If the superheat is over 54⁰F for over 30 seconds, display alarm “Superheat is
over 54⁰F” and turn the compressor off. Add this alarm to the Alarm list and
BMS. Reset the alarm if the superheat is below 40⁰F and turn the compressor
back on.
9.4 Dehumidification Mode
Dehumidification is controlled based on return air conditions and has five control
modes: None, 1C In Limit (one compressor within reheat limit), 1C No Limit (one
compressor without reheat limit), 2C In Limit (two compressors within reheat limit) and
2C No Limit (two compressors without reheat limits).
There are three dehumidification control modes for single compressor unit:
None, 1C in Limit and 1C No Limit.
There are five dehumidification control modes for dual compressors unit.
Reheat is required for dehumidification.
Dehumidification cooling can be controlled by relative humidity and/or dew point.
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