Daikin MicroTech III - Variable Compressor Control; Variable Compressor Settings

ED 15103-6 • MICROTECH III WSHP UNIT CONTROLLER 42 www.DaikinApplied.com
ComprehensIve daTa Tables
Table 19: Network Variable Outputs (NVOs) - SmartSource Single and Two Stage Compressor and Ennity Large Two
Compressor, Continued
Point Name
lonWorks Variable
(NV Index
2
)
SNVT Type
(SNVT Index)
Range/
Default
(in Units)
Heart-
beat
Description
Network Variable Outputs (NVOs)
Unit Status Output
nvoUnitStatus
(27)
SNVT_hvac_status
(112)
Send
Indicates the unit status. It combines the operating mode,
the capacity of heating and cooling, and any alarms that
are present in the object. The in_alarm status indicates the
highest priority current alarm identier.
Unit Status Fields
• mode: (see supported modes below)
• heat_output_primary: 0 to 100%
• heat_output_secondary: 0 to 100%
• cool_output: 0 to 100%
• econ_output: 0 to 100%
• fan_output: 0 to 100%
• in_alarm: (see alarm identiers below)
Supported Modes
1 = HVAC_HEAT (Heating Mode)
3 = HVAC_COOL (Cooling Mode)
6 = HVAC_OFF (Inactive Control)
9 = HVAC_FAN_ONLY (Fan Only Mode)
14 = HVAC_DEHUMID (Dehumidication Mode)
SmartSource (Series2) Alarm Identiers
0 = No Alarms
1 = IO Exp Communication Fail
2 = Invalid Conguration
3 = Low Voltage Brownout
4 = Comp High Pressure
5 = Comp Low Pressure
6 = Comp Suctn Temp Snsr Fail
7 = Comp Low Suction Temp
8 = Freeze Fault Detect
9 = Room Temp Sensor Fail
10 = Entering Water Temp Snsr Fail
11 = Leaving Water Temp Snsr Fail
12 = Condensate Overow
13 = Low Entering Water Temp
14 = Serial EEPROM Corrupted
15 = Wtrside Econ Low Temp Cutout
Ennity Large Two Compressor (SS2C) Alarm Identiers
0 = No Alarms
1 = IO Exp Communication Fail
2 = Invalid Conguration
3 = Low Voltage Brownout
4 = Comp #1 High Pressure
5 = Comp #2 High Pressure
6 = Comp #1 Low Pressure
7 = Comp #2 Low Pressure
8 = Comp #1 Suctn Temp Snsr Fail
9 = Comp #2 Suctn Temp Snsr Fail
10 = Comp #1 Low Suction Temp
11 = Comp #2 Low Suction Temp
12 = Freeze Fault Detect
13 = Room Temp Sensor Fail
14 = Entering Water Temp Snsr Fail
15 = Leaving Water Temp Snsr Fail
16 = Condensate Overow
17 = Low Entering Water Temp
18 = Serial EEPROM Corrupted
19 = Wtrside Econ Low Temp Cutout
1. Analog Null (0x7FFF) is a discrete temperature value of 621.806ºF/327.67ºC. Its purpose is to indicate a sensor failure condition or when the unit controller is not
using that temperature value.
2. The Network Variable index number is a unique identier for certain LonWorks variables. Some BAS companies use this numeric value instead of text to
reference these variables. The NV index number can also be found in the XIF le.
3. After Receive Heartbeat is enabled, this variable reverts to the default (non-override) value if it is not refreshed often enough through a network command or if
communication is disabled (i.e. the device is disabled or is ofine).
4. The totalizer continues to increment until the maximum count is reached, at which point the BAS must reset the value by issuing a write command. The variable is
saved in nonvolatile memory every 24 hours. If power is lost, that day’s totalizer information is not stored.