2. Processes and functions
2-7 Overload Protection (Heating)
This function prevents the air conditioner from overloading.
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147 |
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144 |
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140 |
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INDOOR UNIT COIL |
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TEMP. (E2) |
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138 |
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131 |
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127 | OVERLOAD |
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| PROTECTION | OVERLOAD PROTECTION |
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| FUZZY CONTROL |
| FUZZY CONTROL | ||
ELECTRONIC REF. |
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CONTROL VALVE | OPEN | OPEN |
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OUTDOOR FM |
| START UP |
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H OR M | COMPENSATION | H | L | H OR M | |
| OFF | ||||
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| 1927_THS_I |
Fig. 10
Chart Explanations and notes
❑This chart shows how the outdoor fan speed and the electronic refrigerant control valve react to coil temperature to keep the indoor heat exchanger coil from overloading.
❑When sensor E2 rises above 140°F the electronic refrigerant control valve opens at 50 steps/30 seconds until E2 falls below 138°F.
❑Sensor E2 is located in the middle of the indoor unit heat exchange unit.
❑When sensor E2 rises above 144°F, the control circuit stops the outdoor fan motor till the temp. drops to 131°F
❑Fuzzy control controls the electronic refrigerant control valve.
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SM830082
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