Thermostat Control - Daikin Sky Air R-407C Service Manual

ESIE02–01
1.7

Thermostat Control

Applicable units All units
Purpose The purpose of thermostat control is to control the compressor operation, by sensing the suction air.
Preventing The thermostat control prevents the thermostat from turning OFF in the following conditions:
thermostat OFF
conditions
∆Tr The table below shows how to calculate ∆Tr.
In...
Cooling
Heating
Time chart The time chart below illustrates the thermostat control.
Thermostat ON
Thermostat The table below describes when the thermostat turns ON and OFF.
When...
Part 2 – Functional Description
Initial operation for the first 2.5 min, or
Defrosting, or
Forced operating mode.
∆Tr =
Tr - Ts
Ts - Tr
∆Tr
1 K
0 K
OFF
∆Tr ≥ 1 K
Guard timer of the compressor has counted down (3 min)
∆Tr ≤ 0 K
Thermostat is ON for min. 2 min
Remark
Tr = indoor unit suction air temp.
Ts = temp. set by the remote control
General Functionality
Then the thermostat turns...
ON
OFF
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