7. Control Function Description
7.1 Load Control
Cooling Mode
● When the temperature
“Set tempe”U22”, and the load has stopped for “U10”,
≧
the load starts.
● When the temperature
“Set temperature”
≦
-”U22”, and the load has run for “U11”, the
load stops.
For example:
If set temperature is 18
℃，
【
U22
】
is 2
. When the temperature
20
, compressor starts. If
℃
≧
℃
the temperature
16
≦
℃，
compressor stops. The room temperature will be between 18±2
.
℃
Heating Mode
● When the temperature
“Set temperature”
≦
-”U22”, and the load has stopped for “U11”, the
load starts.
● When the temperature
“Set tempe”U22”, and the load has
≧
run for “U10”, the
load stops.
For example:
If set temperature is 18
℃，
【
U22
】
is 2
. If the temperature
16
℃
≦
℃，
compressor starts. If the
temperature
20
, com
≧
℃
pressor stops. The room temperature will be between 18±2
.
℃
7.2 Delay Load Output
● After power supply, the load is able to start only after the time (U10) has passed.
● After the load stops, it is able to restart again only after the time (U10) has passed.
● After the load starts, it is able to stop only after the time (U11) has passed.
7.3 Protection Running Mode When Room Temperature Sensor Fails
When the room temperature sensor fails, the system will automatically run into the protected
running mode. In this mode, the compressor will run and stop with the period of 30 minutes.
Compressor works for U12* 3 minutes, stops for
﹛
30 - (U12* 3)
﹜
minutes.
For example: Set
【
U12
】
is 3
，
when the temperature sensor fails
，
compressor runs for 9
minutes and then stops 21 minutes, move in circles. If U12=0, system stops when sensor fails
7.4 Buzzer Function
Buzzer sounds shortly for every key press. When confirming the parameter setting, it sounds
longer. 3 short beeps means invalid. When the system comes wrong or external alarm input,
the buzzer alarm function will be off if U62=0, or the buzzer continuous alarming if U62=1.
After the system problem solved and disappears, press
【
P
】
key to stop warning.
7.5 High-temperature and Low-temperature Warning
●
When the room temperature ≥ “set tempe “U50”, and the time reaches to “U52 or
U53 or U34
”, high temperature warning starts.
●
When the test temperature
≦
“set tempe “U51”, and the time reaches to “U52 or
U53 or U34
”, low temperature warning starts.
7.6 Dry Contact Alarm Output
When the sensor fails, high/low temperature warns, or external warning input, the dry contact
relay opens and dry contact alarm outputs.
7.7 External Input Warning
Summary of Contents for ZL-660A-R
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