Daikin EWYQ230DAYN [343/524] Min timgrd 3min or more

ESIE06-05 Functional Control for a Standalone Unit

Part 2 – Functional Description 2–117

Extension of restart prevention timer

During restart after FORCED Thermo OFF due to anti-freeze by refrigerant gas temperature or leaving

water, the restart compressor timer value (REF GRD EXTEND) is 12 minutes (default).

This “REF GRD EXTEND” value can be changed in the service/safety menu.

Protection control

of compressor

running area during

heating

Introduction

When the compressor is operating in heating mode, a compressor protection function will avoid that

the compressor works out of operation area.

Function

When two compressors are in operation of this circuit:

■ If activation condition 1 or 2 is satisfied for 120 seconds:

Reduce 1 compressor immediately.

When 1 compressor is in operation of this circuit

■ If activation condition 1 or 2 is satisfied for 300 seconds:

Switch off this circuit immediately (thermo off).

Activation

conditions

Activation conditions

1 Te < Tc + c (c= -67°C)

2 Te < d (d= -20°C)

Te: Evaporating temperature.

Tc: Condensation temperature.

Recovery

conditions

In case compressors went from 2 to 1 running compressor: next compressor start-up will be when

condition 3 and 4 are satisfied.

3 Te > Tc + c + a (a=4°C).

AND

4 Te > d + b (b=4°C).

Compressor

Time > 5 min.

TimGrd

(3min or more)

OFF