Basic Mode Controls - Heat Controller VMC09SB-1 Service Manual

2. Basic Mode Controls

2.1 Cooling Mode
+0.5°C(1°F)
Setting
Temp.
-0.5°C(-1°F)
INV. Comp.
Frequency
• 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 30
seconds. ( not emergency conditions)
• Compressor turned off when
- intake air temperature is in between ±0.5°C(±1°F) of the setting temp. limit for three minutes continuously.
- intake air temperature reaches below 1.0°C(2°F) of the temperature of setting temp..
• Compressors two minutes time delay.
- After compressor off, the compressor can restart minimum 2 minutes later.
2.2 Heating Mode Heatpump Only
5˚C(9˚F)
2˚C(3.6˚F)
Setting
Temp.
INV. Comp.
High
Frequency
• 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 30 sec-
onds.
• Condition of compressor turned off
- When intake air temperature reaches +5°C(9°F) above the setting temperature.
• Condition of compressor turned on
- When intake air temperature reaches +2°C(3.6°F) above the setting temperature.
* Condition of indoor fan turned off
- While in compressor on : indoor pipe temp. < 20°C(68°F)
- While in compressor off : indoor pipe temp. < 30°C(86°F)
• While in defrost control, the indoor and outdoor fans are turned off.
• Compressor 2minutes delay
- After compressor off, the compressor can restart minimum 2 minutes later.
Only for training and service purposes
High Low
Low Comp. OFF
Comp. OFF High
High Low Comp. OFF
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Part 2 Functions & Controls
Thermo ON
Thermo OFF
Low
Thermo OFF
Thermo ON