Clear Alarms - Network; Active Alarms; Table 12. Modbus Warning Alarms - Daikin McQuay MicroTech III Manual

Clear Alarms - Network

Keypad Menu Path No Keypad Equivalent
This read/write holding register clears all active alarms. Many alarms are automatically clear. Of the alarms that need to
be manually cleared, only those listed below can be cleared from the network:
•
UNIT SHUTDOWN - Evaporator Water Flow Loss
•
UNIT SHUTDOWN–Evaporator Leaving Water Temp Low (Freeze)
•
CIRCUIT SHUTDOWN – Evaporator 1 Freeze Protection
•
CIRCUIT SHUTDOWN – Evaporator 2 Freeze Protection
The default is Null, which will cause Normal to be used provided nothing else is writing to this point. This register is
ignored by the unit controller if Chiller Local/Remote is set to Local.
Data Type Holding Register
RW Holding Register
10

Active Alarms

Tables 12-14 show the registers needed to read each individual alarm, the alarm index, and the alarm code.

Table 12. Modbus Warning Alarms

Alarm Class Monitoring
Alarm Index Alarm Code
(Holding (Holding
Register 28) Register 31)
5 1281
1829
1861
7
1893
1925
8 2049
9 2305
11 2817
3105
3137
12
3169
3201
13 3329
29
Measurement
NA
Warning Alarms
Individual Alarm Monitoring
Holding Registers
(0=Normal, 1=Alarm)
369
371
373
375
376
377
378
740
741
742
743
744
745
Units Valid Range
0=Normal
N/A 1=Clear Alarm
2=Null
Alarm Description
Evaporator pump maintenance
Compressor #1 maintenance
Compressor #2 maintenance
Compressor #3 maintenance
Compressor #4 maintenance
Bad setpoint override input
Bad demand limit input
Unit Power Restore
Circuit Failed Pumpdown - Circuit #1
Circuit Failed Pumpdown - Circuit #2
Circuit Failed Pumpdown - Circuit #3
Circuit Failed Pumpdown - Circuit #4
External Event
ED 15121