Electra OU10-47T ST Wartungshandbuch PDF herunterladen (Seite 38)

CONTROL SYSTEM

11-3

SM SAFRPM 1-A.0 GB

11.5.5 Defrost

Defrosting of the outdoor heat exchange is controlled by the microprocessor with detection by the

indoor pipe temperature sensor.

Defrost control type is according to the JC on the PCB whether is connected.

1. When the JC is connect on the PCB

When one of the conditions of A, Band C is satisfy, the defrosting operation stars.

In the condition A, it must satisfy the condition a),b) and c) then into defrosting operation.

a) IPT1 satisfy IPT1=IPT

MAX

- ΔIPT (8

b) t5≥50 minutes (the compressor cumulative operation time ≥50minutes, t5 is permitted move

and lower than t1 too).

c) IPT <40

C, and keep 2 minutes.

According to the condition A enter the defrosting operation, the first defrosting operation time is

8minutes; After defrosting operation one cycle, and then judge and regulate the defrosting operation

time.

CONTENTS

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Electra OU10-47T ST Wartungshandbuch Seite 38