ClearIng alarms-lonWorKs
www.DaikinApplied.com 97 ED 15062-7 • MICROTECH II CHILLER CONTROLLER
ClearIng alarms-lonWorKs
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This network input variable clears all active alarms. It cannot clear all alarms in the Fault category
(alarms that shut down the chiller). They would have to be cleared at the chiller panel. The alarms that
cannot be cleared over the network, but can be cleared at the chiller, are:
• Low Evaporator Pressure
• High Condenser Pressure (by pressure sensor)
• High Condenser Pressure (by pressure switch)
• Low Oil Pressure
• Freeze Protection
• High Motor Temperature
NOTE: The above list pertains only to Centrifugal chillers.
Flow Loss is the only alarm that can be cleared
remotely on all other chillers.
In addition to the Current Alarm network variable,
nvoChillerStat indicates whether or not the chiller is in an alarm
condition, but it does not describe the alarm condition.
Measurement Units Data Type Valid Range Default Value
N.A. N.A. Structure See Below NA
Variable Details
LONWORKS Name Prole SNVT Type SNVT Index SNVT Size
nviClearAlarm Proprietary switch 95 two bytes
Structure
typedef struct {
unsigned value;
signed state;
} SNVT_switch;
Valid Range
Value Field unused
State Field 0 No Alarm
1 Clear Alarm
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