Daikin Modular L Smart, Service Manual

Page: 32 / 90

ESIE19-06 | Part 2. Troubleshooting 2.3. Symptom based troubleshooting
Page 32 21/01/20 | Version 1.1
Modular L Smart
2.3.3. Equipment operates but does insufficient air flow
2.3.4. Large operation noise and vibration
Possible failures Root cause Check Corrective action
Root cause category: installation
Low air flow rate. Field setting of RPM is not
according to required ESP. Check with designer of duct
work what ESP is required. Adjust field setting RPM, or
perform an auto ESP check
function.
Root cause category: component - mechanical
Low air flow rate. Grills on suction or/and dis-
charge changed since start up. Check if all grills are in correct
position. Perform a new auto ESP
check function.
Root cause category: component - electrical
Equipment operates but does
perform target air flow rate. Incorrect of NG operation of
the fan motor(s). Check operation of fan
motor(s). Replace the fan motor(s)
and/or inverter PCB fan motor.
Possible failures Root cause Check Corrective action
Root cause category: installation
Large operation noise and
vibration. Unit is not installed according
the installation manual. Check to make sure that the
required spaces for the instal-
lation are provided. Install the unit according the
installation manual.