Equipment Operates But Does Insufficient Air Flow; Large Operation Noise And Vibration - Daikin Modular L Smart Service Manual

ESIE19-06 | Part 2. Troubleshooting

2.3.3. Equipment operates but does insufficient air flow

Possible failures
Root cause category: installation
Low air flow rate.
Root cause category: component - mechanical
Low air flow rate.
Root cause category: component - electrical
Equipment operates but does
perform target air flow rate.

2.3.4. Large operation noise and vibration

Possible failures
Root cause category: installation
Large operation noise and
vibration.
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Modular L Smart
Root cause
Field setting of RPM is not
according to required ESP.
Grills on suction or/and dis-
charge changed since start up.
Incorrect of NG operation of
the fan motor(s).
Root cause
Unit is not installed according
the installation manual.
2.3. Symptom based troubleshooting
Check
Check with designer of duct
work what ESP is required.
Check if all grills are in correct
position.
Check operation of fan
motor(s).
Check
Check to make sure that the
required spaces for the instal-
lation are provided.
Corrective action
Adjust field setting RPM, or
perform an auto ESP check
function.
Perform a new auto ESP
check function.
Replace the fan motor(s)
and/or inverter PCB fan motor.
Corrective action
Install the unit according the
installation manual.
21/01/20 | Version 1.1