Fujitsu ASTG30KMTC - Heater Control Logic; Auxiliary Heater Control 1 Logic; Auxiliary Heater Control 2 Logic

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Auxiliary heater control 1

Operation Condition

Heater on Heater is on as shown in following diagram of heating temperature.

Heater off

• Heater is off as shown in following diagram of heating temperature.

•

Other than heating mode

• Error occurred

• Forced thermostat off

• Fan stop protection

• Temperature of heater on (Thon): Adjustable by function number 62 (Operating temperature

switching of external heaters).

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All control temperatures will shift by adjusting “Thon”.

Off

Tr-Ts ≥ -1°C

r-Ts

Tr-Ts (=Thon) < -3°C

Tr-Ts ≥ -10°C

Tr-Ts < -12°C

Tr: Room temperature

Ts: Set temperature

Thon: Heater on temperature

Example: When set temperature (Ts) is 22°C (Factory setting),

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and room temperature (Tr) increases above 12°C, signal output is on.

• and room temperature (Tr) increases above 21°C, signal output is off.

• and room temperature (Tr) decreases below 19°C, signal output is on.

• and room temperature (Tr) decreases below 10°C, signal output is off.

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Auxiliary heater control 2