Single Zone Service Manual - General

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Part 2 Functions & Controls
2. Basic Mode Controls
2.1 Cooling Mode
Setting
Temp.
-0.5C(-1F)
+0.5C(1F)
Comp. OFF
Thermo ON
Thermo OFF
INV. Comp.
Frequency
LowHigh
LowHigh
• Operating frequency of compressor depends on the load condition, like the difference between the room temp. and
the set temp., frequency restrictions.
• If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 90
seconds. ( not emergency conditions)
• Compressor turned off when
- Intake air temperature reaches below 0.5°C(1°F) of the setting temperature for three minute continuously.
- Intake air temperature reaches below 1.5°C(3°F) of the setting temperature
• Compressors 3 minute time delay.
- After compressor off, the compressor can restart minimum 3 minute later.
2.2 Heating Mode
2˚C(3.6˚F)
4˚C(˚F)
Comp. OFF
INV. Comp.
Frequency
LowHigh LowHigh Comp. OFF
Setting
Temp.
Thermo ON
Thermo OFF
• Operating frequency of compressor depend on the load condition, The difference between the room temp. and set
temp., frequency restrictions.
• If compressor operates at some frequency, the operating frequency of compressor cannot be changed within 90 sec-
onds.
• Condition of compressor turned off
- When intake air temperature reaches 4°C(°F) above the setting temperature.
• Condition of compressor turned on
- When intake air temperature reaches below 2°C(3.6°F) of above the setting temperature.
* Condition of indoor fan turned off
• While in defrost control, the indoor and outdoor fans are turned off.
• Compressor 3 minute delay
- After compressor off, the compressor can restart minimum 3 minute later.