Function And Control - York DHW36CMB21S Service Manual

Service Manual

6. Function and Control

1.Function Control
1) Cooling mode
needs or calls the cooling operation condition, the system
s d
corresponding electronic expansion valve will be closed.
ing
d. 4-way valve
energizes
e. Outdoor fan control in cooling mode
set speed.
.
3) Heating mode
i s ies
heating mode.
.
s
demand.
ing h .
e. Defrosting function
de-energizes
an extended time, the system will run an oil-return operation in high frequency;
operation will run for 60 seconds.
4) Fan mode
the s (will be off), de-energized.
2.Protection Function
(different modes of operation)
When one indoor unit is calling for cooling and another indoor unit is calling for heat the
2) Overload protection
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