Daikin MicroTech Operation And Maintenance page 57

Space Humidity Sensor Failure
Name: SpaceHumiditySensorAlarm
Description: Space humidity sensor failure (short or open
detected).
Type: Problem
Activate: Space humidity sensor control is enabled,
appropriate input is configured for an space humidity sensor
and the sensor reading is out of range.
Upon active:
• State: if in dehumidification then transition to Fan Only
• Alarm is indicated on the LUI
• Fault relay is energized if alarm output configuration is
FAULTPROB
• LED output alarm indication is activated
• Enthalpy comparison economizer cannot be used
• Dehumidification function cannot be used
Deactivate: Sensor reading goes back in range.
Reset: Auto
Outdoor Humidity Sensor Failure
Name: OutdoorHumiditySensorAlarm
Description: Outdoor humidity sensor failure (short or open
detected)
Type: Problem
Activate: Outdoor humidity sensor control is enabled,
appropriate input is configured for an outdoor humidity sensor
and the sensor reading is out of range.
Upon active:
• Alarm is indicated on the LUI
• Fault relay is energized if alarm output configuration is
FAULTPROB
• LED output alarm indication is activated
• OA enthalpy nor enthalpy comparison economizer can be
used
Deactivate: Sensor reading goes back in range.
Reset: Auto
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Space CO Sensor Failure
2
Name: SpaceCO2SensorAlarm
Description: Space CO
detected).
Type: Problem
Activate: Appropriate input is configured for a CO
the CO reading is out of range.
2
Upon active:
• State: None
• Alarm is indicated on the LUI
• Fault relay is energized if alarm output configuration is
FAULTPROB
• LED output alarm indication is activated
• CO demand controlled ventilation is disabled if this value
2
is used for the effective CO
input is being supplied)
Deactivate: Sensor reading goes back in range.
Reset: Auto
Entering Water Inadequate Indication
Name: WaterInTempInadequateAlarm
Description: Checks if entering water temperature is adequate
for current unit mode.
Type: Problem
Activate: all of the following are true:
• Appropriate input is configured for EWT
• Cooling/Heating request has been active for longer than
the delay timer
• The measured entering water temperature is <5°F below
the control temperature for cooling or <5°F above the
control temperature for heating
Upon active:
• Alarm is indicated on the LUI
• Fault relay is energized if alarm output configuration is
FAULTPROB
• LED output alarm indication is activated
Deactivate: The measured entering water temperature is more
than 5°F below the control temperature for cooling or more
than 5°F above the control temperature for heating.
Reset: Auto
57 OM 1280-2 • MICROTECH UNIT CONTROLLER
Diagnostics and Service
sensor failure (short or open
2
sensor and
2
reading (i.e. no network CO
2 2