[
VIII
Control ]
- 84 -
HWE07150
GB
(2) Heating operation
1) When outdoor unit starts defrosting, it transmits defrost operations command to indoor unit, and the indoor unit start defrosting
operations. Similarly when defrosting operation stops, indoor unit returns to heating operation after receiving defrost end com-
mand of outdoor unit.
2) Defrost end condition: 12 or more minutes must pass after defrost operation or outdoor unit piping temperature.
Refer to "-7-. Defrost operation control" of [2] Controlling the Outdoor Unit (page 74) for the temperature.
Heating operation
Test run mode
ON
Thermostat ON
Defrost
operation
3-minute restart
prevention
*Note 1,2
*Note 1,2
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
1. Indoor/outdoor unit fan control
2. Inverter frequency control
3. Indoor unit LEV, LEV1,LEV2a, LEV2b control
4. Solenoid valve control
5. 72C control
Normal operation
Defrost operation
4-way valve ON
During test run mode
1. Indoor unit fan operation at
Very Low speed
2. Inverter output 0Hz
3. Indoor unit LEV, LEV1 Fully closed
LEV2a, LEV2b rated opening
4. All solenoid valves OFF
5. Outdoor unit fan stop
6. 72C OFF
4-way valve OFF
Stopping the
defrost operation
Stopping the defrost
operation
Return to heating
operation
1. Indoor unit fan stops
2. Inverter defrost frequency control
3. Indoor unit LEV fully closed.
4. Solenoid valve control
5. Outdoor unit fan stop
6. LEV1 control
7. LEV2a, LEV2b fully opened.
8. 72C control
Unit in the stopped state
Содержание City Multi PFAV-P500VMH-E
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Страница 48: ... 39 HWE07150 GB IV Indoor Unit Structure 1 External View 41 2 Control Box 42 3 Board 43 4 Fan 44 ...
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Страница 50: ... IV Indoor Unit Structure 41 HWE07150 GB IV Indoor Unit Structure 1 External View PFAV P500VMH E ...
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Страница 66: ... 57 HWE07150 GB VII Refrigerant Circuit 1 Refrigerant Circuit Diagram 59 2 Principal Parts and Functions 60 ...
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Страница 196: ... 187 HWE07150 GB XI LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 189 ...
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