Carrier 38QCR018713 Service Manual download pdf (Page 25)

Service manual

8.7 Heating mode

8.7.1 Generally, the 4-way valve is open in heating mode, but it is closed in defrosting mode. 4-way valve must

delay 2 minutes compared with compressor if the compressor changed into non-heating mode or turned off.

4-way valve doesn't delay in dehumidifying mode

8.7.2 Generally, the outdoor fan is turned off with the on-off action of compressor in heating mode, except for

the defrosting mode or the end of defrost

8.7.3 Action of compressor and outdoor fan motor at heating mode: compressor must run for 7 minutes after

starting and then judge temperature. Meanwhile other protections are still valid.

Ts+2*

Room temp. up

Room temp. down

Ts+3*

Compressor and

outdoor fan off

Compressor and

outdoor fan on

* This parameter can be changed from 0 to 3

8.7.4 Indoor Fan actions at heating mode

Indoor Fan can be set at HIGH/MID/LOW/AUTO by using a remote controller, but Anti-cold wind function

prevails.

Anti-cold wind control function at heating mode (T=indoor exchanger temp.)

T temp. up

T temp. down

TE2

Setting fan speed

Fan off

Breeze

TE3

TE1

TE4

8.7.5 Auto wind at heating mode (T=indoor temp.)

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Carrier 38QCR018713 Service Manual Page 25