ASCON Service Guide Book
37
6.5 Sequential Controller
It is allowed to configure the controller to suit individual’s need with details below:
1. Models
For each type, there are 3 models for the control to configure into.
Dip switch 1 Dip switch 2 Dip switch 5
a. Cooling (SQCn) Off Off Off
b. Heatpump + no heater (SQHn0) On Off Off
c. Heatpump + 1 heater (SQHn1) Off On Off
d. Heatpump + 2 heater (SQHn2) On On Off
e. Auto heatpump + no heater (SQHn0) On Off On
f. Auto heatpump + 1 heater (SQHn1) Off On On
g. Auto heatpump + 2 heater (SQHn2) On On On
n denotes number of compressor(s)
where the postfix number indicates number of compressor(s).
2. 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 Dip switch 4
a. Default Off Off
b. 0.5°C On Off
c. 1.0°C Off On
d. 1.5°C On On
Note that 1.5°C only valid for 2 and 3 compressors model. For 4 compressors model, maximum
allowed is 1.0°C.
The default differential temperature is base on number of compressor model, the setting is as below:
Model Diff. Temperature
1 compressor Not. Applicable
2 compressors 0.5°C
3 compressors 1.0°C
4 compressors 1.5°C
3. Hot Keep Option
Dip switch 6
a. Fan off Off
b. Fan on On
45. Operating Modes
The system has 4 operating modes to select with respect to each model selection:
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)
Where x denotes modes available
n = number of compressor(s)
h = number of heater(s)
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