McQuay M5MAC Troubleshooting Guide download pdf (Page 31)

Model Diff. Temperature

1 compressor Not. Applicable

2 compressors 0.5°C

3 compressors 1.0°C

4 compressors 1.5°C

Dip switch 6

a. Fan off Off

b. Fan on On

Model Auto Cool Heat Fan

SQCn - X - X

SQHnh - X X X (Dip switch 5 = off)

SQHnh X X X X (Dip switch 5 = on)

JH1 Setting

a. Last memory backup JH1 Plugged

b. Without last memory backup JH1 Removed

The default differential temperature is base on number of compressor model, the setting is as

below:

4. Hot Keep Option

5. Operating Modes

The system has 4 operating modes to select with respect to each model selection:

Where x denotes modes available

n = number of compressor(s)

h = number of heater(s)

6. Last Memory Functions

ThepowerupsettingsforeitherwithorwithoutthelastmemorybackupisbasedontheJH1

setting.

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McQuay M5MAC Troubleshooting Guide Page 31