Interklima High wall unit
II/IO - SCV1
33
3.3 HIGH PRESSURE SWITCH PROTECTION
This is to protect the system from high pressure operation.
System pressure is measured at gas discharge pipeline.
Protection activates when system pressure > 3.2 Mpa,
deactivates < 2.4 Mpa.
a. During COOL/DEHUMIDIFICATION mode, compressor stops,
3 minutes later outdoor fan stops, indoor fan runs
continuously.
b. During HEAT mode, compressor, outdoor and indoor fans
stop, 4-way valve maintains position.
3.4 LOW PRESSURE SWITCH PROTECTION
This is to protect the system from too low pressure operation. Low
system pressure is measured at gas suction pipeline.
Protection activates when system pressure < 0.05 Mpa,
deactivates > 0.15 Mpa.
a. During COOL/DEHUMIDIFICATION mode, compressor stops,
3 minutes later outdoor fan stops, indoor fan runs
continuously.
b. During HEAT mode, compressor, outdoor and indoor fans
stop, 4-way valve maintains position.
3.5 ELECTRIC HEATER STRIP FOR COMPRESSOR
This Electric heater strip is connected with 4-way valve in parallel.
a. Stand- by mode: Indoor Temp. ≤ 25
o
C, the electric heater
strip and 4-way valve are power-on.
b. Stand-by mode: Indoor Temp. ≥ 27
o
C, the electric heater
strip and 4-way valve are power-off.
c. When the compressor is off after cooling operation, the
electric heater strip and 4-way valve off.
d. When the compressor is off after heating operation, the
electric heater strip and 4-way valve operate under above
conditions a and b.
Note: For rotary compressor models, this electric heater strip
installation is optional.
3.6 OUTDOOR FAN SPEED CONTROL (Optional)
The main purpose of outdoor fan speed control (OFSC) is to avoid
freezing of indoor evaporator in cooling mode when outdoor
ambient temperature is low:
a. When the indoor coil temperature descends below 6
o
C, the
outdoor fan runs 60% and stops 40% of the operation cycle.
When the indoor coil temperature descends below 4
o
C, the
outdoor fan runs 30% and stops 70% of the operation cycle.
When the indoor coil temperature descends below 2
o
C, the
outdoor fan stops.
b. When the indoor coil temperature rises over 3
o
C, the outdoor
fan runs 30% and stops 70% of the operation cycle.
When the indoor coil temperature rises over 5
o
C, the outdoor
fan runs 60% and stops 40% of the operation cycle.
When the indoor coil temperature rises over 7
o
C, the outdoor
fan runs continuously.
The operation cycle for each of the above is 20 seconds.
4 OPERATION OF CONTROL PANEL ON HIGH WALL UNIT
4.1 MANUAL ON/OFF BUTTON
a. If the remote control is lost or damaged, you can use the
button under the lift up cover to control the air conditioner.
b. Push the button and operation mode changes in this order:
Cooling/Heating/Off.
c. Set temperature at 24
o
C and fan speed set at auto mode.
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