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Sequential Controller
It is allowed to configure the controller to suit individual's need with details below:
Model Selection
1. Number of Compressor
The control can be configured into 4 main type's base on number of compressors by
changing "R42" values:
Item
Type
1
Single compressor
2
2 compressors
3
3 compressors
4
4 compressors
2. Models
For each type, there are 3 models for the control to configure into.
a. Cooling (SQCn)
b. Heatpump + no heater (SQHn0)
c. Heatpump + 1 heater (SQHn1)
d. Heatpump + 2 heater (SQHn2)
e. Auto heatpump + no heater (SQHn0)
f. Auto heatpump + 1 heater (SQHn1)
g. Auto heatpump + 2 heater (SQHn2)
n denotes number of compressor(s)
where the postfix number indicates number of compressor(s).
3. Stage Differential Temperature
Differential temperature is the temperature difference between turning on or off 1 compressor to
another compressor in thermostat cycle.
The stage differential temperature can be selected from the range shown below:
Dip switch 3
a. Default
b. 0.5°C
c. 1.0°C
d. 1.5°C
Note that 1.5°C only valid for 2 and 3 compressors model. For 4 compressors model, maximum
allowed is 1.0°C.
R value
3k
7.5k
22k
OPEN
Dip switch 4
Off
Off
On
Off
Off
On
On
On
Dip switch 1
Dip switch 2
Off
Off
On
Off
Off
On
On
On
On
Off
Off
On
On
On
Dip switch 5
Off
Off
Off
Off
On
On
On
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