Daikin EWYQ230DAYN [406/524] A4 freeze up

Overview of Fault Indications and Safeties ESIE06-05

3–6 Part 3 – Troubleshooting

1.4 Overview of Unit Safeties

Introduction This section provides useful information for diagnosing and correcting certain troubles which may

occur in the unit.

Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and

look for obvious defects such as loose connections or defective wiring.

When carrying out an inspection on the supply panel or on the switch box of the unit, always

make sure that the circuit breaker of the unit is switched off.

Unit safety

overview

Unit Safety

description

OAE : FLOW HAS STOPPED

Purpose:

■ To prevent that chiller start up without flow.

■ To stop chiller when there is no flow.

MESSAGE SAFETY MENU

UNIT SAFETY

0AE:FLOW HAS STOPPED

0AE:PUMPINTERLOCK

0A4:FREEZE UP

0A9:EEV PCB COMM ERR

0A9:EEV PCB ERR

0C9:INL SENSOR ERR

0CA:OUT SENSOR ERR

0H9:AMB T SENSOR ERR

0U4:EXTPCB COMM.ERR

0U4:MAINPCB COMM.ERR

0U5:PCB COMM.PROBLEM

Symptom: Flowswitch is activated

POSSIBLE CAUSES CORRECTIVE ACTION CONSEQUENCE

No water flow for 5 seconds

continuously or too low water

flow.

Check the water pump filler

and the water circuit for

obstructions.

Unit switched off.

RESET : After finding the cause, the flowswitch is reset automatically, but the controller still needs

to be reset.