Daikin Modular L Smart Service Manual page 77

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Installation, use and maintenance manual (69 pages)

Table of Contents

ESIE19-06

Part 5. Appendix

Malfunction code

Particular code

In case of malfunction with the code on grey background, the unit still operates. However, make sure to have it inspected and repaired as soon as possible.

Prevent of frost the heat-exchanger

•

If electrical pre-heating is present:

electrical pre-heating coil will prevent frosting of the heat-exchanger, modulating once the fresh air temperature goes below the threshold value set at 0°C, in case of heater

malfunction or not sufficient flow for its startup, a differential pressure switch will shutdown the unit until the defrosting.

•

If electrical pre-heating coil is not present:

a differential pressure switch will prevent frosting of heat exchanger, shutting down the unit once the frosting starts.

ARNING

The differential pressure switch will be set according to the nominal air flow. If the Modular L Smart will operate at different condition from nominal airflow, you MUST adjust the set-

ting according to the chart below.

Frost prevent differential pressure switch factory settings

Size

225

Factory settings for frost-protection Differential Pressure Switch:

21/01/20

Version 1.1

Description

EEPROM failure

Locked rotor

Unstable fan rpm: failure of filter contamination

Power supply malfunction