Delta PG-35 User Manual download pdf (Page 33)

11-5

CONTROL SYSTEM

SM DELTAZ 1-E.0 GB

11.6 Dry Mode

As long as room temperature is higher then the set point, indoor fan will work in low speed and

compressor will work between 0 and MaxNLOADIF1C Hz.

When the room temperature is lower than the set point, compressor will be switched OFF and

indoor fan will cycle 3 minutes OFF, 1 minute ON.

11.7 Protections

There are 5 protection codes.

Normal (Norm) – unit operate normally.

Stop Rise (SR) – compressor frequency can not be raised but does not have to be decreased.

HzDown1 (D1) – Compressor frequency is reduced by Down1 Hz/min.

HzDown2 (D2) – Compressor frequency is reduced by Down2 Hz/min.

Stop Compressor (SC) – Compressor is stopped.

11.7.1 Indoor Coil Defrost Protection

ICT

ICT Trend

Fast

Increasing

Increasing No change Decreasing

Fast

Decreasing

ICT < -2 SC SC SC SC SC

-2 ≤ ICT < 0 D1 D1 D2 D2 D2

0 ≤ ICT < 2 SR SR D1 D2 D2

2 ≤ ICT < 4 SR SR SR D1 D2

4 ≤ ICT < 6 Norm Norm SR SR D1

6 ≤ ICT < 8 Norm Norm Norm SR SR

8 ≤ ICT Normal

11.7.2 Indoor Coil over Heating Protection

ICT

ICT Trend

Fast

Decreasing

Decreasing No Change Increasing

Fast

Increasing

ICT > 55 SC SC SC SC SC

53 < ICT ≤ 55 D1 D1 D2 D2 D2

49 < ICT ≤ 53 SR SR D1 D2 D2

47 < ICT ≤ 49 SR SR SR D1 D2

45 < ICT ≤ 47 Norm Norm SR SR D1

43 < ICT ≤ 45 Norm Norm Norm SR SR

ICT ≤ 43 Normal

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Delta PG-35 User Manual Page 33

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