Daikin MicroTech III Installation And Maintenance Manual page 18

MicroTech III Unit Controller LED Faults (Continued)
Freeze Fault Detect
Description
Freeze Fault Detect
• Low entering water temperature (below 35°F standard range or 13.5°F extended range)
Condensate Overflow (Freeze Fault Protection Only)
Description
Condensate Overflow
• Poor condensate drain.
• Check the resistance to ground on condensate wire. This should be open if there is no water in the pan.
Serial EEPROM Corrupted
Description
Serial EEPROM Corrupted
• Disconnect the BAS communication wiring and cycle power to the controller
○ If the alarm clears confirm that the BAS is not writing setpoints values that are out of range
○ If the alarm persists replace the controller
Waterside Economizer Low Temp Cutout (WSE Control & Call for Cooling)
Description
Waterside Economizer Low Temp
Cutout (WSE Control & Call for
Cooling)
• Water temperature is below 35°F.
Service Test Mode Enabled
Description
Service Test Mode Enabled
• Jumper JP1 is shorted for test mode operation.
Unoccupied Mode
Description
Unoccupied Mode
• Terminal U on main control board is connected to common from external source or commanded by network.
Occupied, Bypass, Standby, Modes
Description
Occupied, Bypass, Standby, Override
Modes
• Unit is operating normal. It may currently have a control signal or ready to operate when a control signal is active.
Baseboard Communication Fail
Description
Baseboard Communication Fail
• Verify jumper JP8 on main board is shorted.
• Verify connection of cable between H5 on main board and H1 on I/O expansion board.
Entering Water Temp Sensor Fail (Boilerless Electric Heat, Hydronic Heat or Waterside Economizer
Only)
Description
Entering Water Temp Sensor Fail
(Boilerless Electric Heat or Waterside
Economizer Only)
• Verify jumper JP8 on main board is shorted.
• Verify connection of cable between H5 on main board and H1 on I/O expansion board.
Low Entering Water Temperature (Heating) (No Display On Boilerless Electric Heat)
Description
Low Entering Water Temperature (No
Display On Boilerless Electric Heat)
• Verify entering water temperature is greater than set point.
OM 1149-5
Type Yellow
Fault Flash
Type Yellow
Fault ON
Type Yellow
Fault ON
Type Yellow
Mode Flash
Type Yellow
Mode Flash
Type Yellow
Mode ON
Type Yellow
Mode OFF
Type Yellow
Fault Flash
Type Yellow
Fault ON
Type Yellow
Fault OFF
18
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Green Red
OFF Flash
Green Red
OFF OFF
Green Red
ON ON
Green Red
ON Flash
Green Red
Flash Flash
Green Red
ON OFF
Green Red
ON OFF
Green Red
OFF Flash
Green Red
OFF Flash
Green Red
ON Flash
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