OMM 1008-1 41
ALARMS Setpoint
Figure 19, ALARMS Setpoint Screen
Table 18, ALARM Setpoints
Description No. Default Range
Pass-
word
Comments
Condenser Freeze 11
34.0 °F -9.0 to 45.0 °F
T Minimum cond. sat. temp. to start pump
Evaporator Freeze 10
34.0 °F -9.0 to 45.0 °F
T Minimum evap. sat. temp. to start pump
Motor Current Threshold 9 10% 1 to 20% T Min %RLA to consider that the is motor off
Surge Slope Limit 8
20 deg
F/min
1 to 99
deg F/min
T
Surge temperature (ST) slope value above
which alarm occurs. Active only if ST>SP7
at start
Surge Temperature Limit 7
50 °F 2 to 45 °F
T
At start, Surge Temp (ST) is compared to
this SP. Alarm at ST>2x SP.
High Discharge Temp-Stop 6
190 °F 120 to 240 °F
T
Max discharge temp to shut down
compressor
High Discharge Temp-Load 5
170 °F 120 to 240 °F
T
Sets discharge temp above which a forced
capacity increase occurs.
High Condenser Pressure 4 140 psi 120 to 240 psi T Max discharge pressure, stop compressor
Low Evap Pressure, Stop 3 26 psi 10 to 45 psi T Min evap pressure – stop compressor
Low Evap Pressure-Unload 2 31 psi 20 to 45 psi T Min evap pressure – unload compressor
Low Evap Pressure-Inhibit 1 33 psi 20 to 45 psi T Min evap pressure – inhibit loading
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