Daikin McQuay 910121754 Dados de instalação e manutenção - Página 14
Procurar online ou descarregar pdf Dados de instalação e manutenção para Acessórios Daikin McQuay 910121754. Daikin McQuay 910121754 16 páginas. Digitally adjustable display sensor for water source heat pumps smartsource gs series; smartsource gt series; with microtech iii controls enfinity cch series; enfinity ccw series; enfinity vfc series; enfinity vfw series; enfinity lvc series; enfinity lvw
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Diagnostics
Problem & Possible Solution
No Display
• Check the power connections and power voltage level
• Replace unit if power is okay.
No Temperature Signal
• Be sure the termination and wiring is correct and the
controller is set up properly. Make sure the "Override/
Reset" button is not stuck down.
• Replace unit if all checks are okay.
Override/Reset Not Working
• Measure the resistance to ground at the sensor output
terminal (Term. 4). When pushing the Override Button, it
should show a short. If not, replace the sensor.
No Fan Voltage Signal
• Be sure the termination and wiring is correct and the
controller is set up properly.
• Replace unit if all checks are okay.
No System Voltage Signal
• Be sure the termination and wiring is correct and the
controller is set up properly.
• Replace unit if all checks are okay.
De-humidification Not Working
• Adjust the System Mode to DHUM and check terminal
DH for voltage.
• Change the RH setpoint above and below the ambient RH
to prove the output contact.
• Replace unit if it still doesn't work.
Page 14 of 16 / IM 1171-3
Occupied Not Working
•
Verify that this terminal is in a powered circuit. Measure
the voltage to ground at the occupied terminal (U). When
pushing the Occupied Button (<2 secs), it should read
close to 0 volts. When you lift the button it should read
high volts.
•
Replace unit if it still doesn't work.
"Err" shown on the screen
•
This indicates that the temperature and humidity sensing
element has failed.
Problem & Possible Solution (Continued)
FAN key does not change Fan Mode
•
Check to verify FAN is not locked out in Programming
Mode Menu Page P6.
MODE key does not change System Mode
•
Check to verify Mode is not locked out in Programming
Mode Menu Page P7.
Up or Down key does not change Setpoints
•
Check to verify Set points are not locked out in
Programming Mode Menu Page P11.
Solid Man goes away after 20 seconds
•
Occupancy Request was not acknowledged by Main
controller, check wiring of Status Signal from controller.