Design and Technical Manual

ManualsBrandsFujitsu ManualsCooling & Air Quality9,000 BTU 26.5 SEER Ductless Mini-Split Heat Pump System

Table Of Contents

DESIGN & TECHNICAL MANUAL
- Part 1. INDOOR UNIT
- Part 2. OUTDOOR UNIT

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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).

• All control temperatures will shift by adjusting “Thon”.

Off

Tr-Ts ≥ -1.8°F

(-1°C)

Tr-Ts

Tr-Ts (=Thon) < -5.4°F

(

-3°C)

Tr-Ts ≥ -18°F

(-10°C

）

Tr-Ts < -21.6°F (-12°C)

Tr: Room temperature

Ts: Set temperature

Thon: Heater on temperature

Example: When set temperature (Ts) is 72°F (22°C) (Factory setting),

• and room temperature (Tr) increases above 53.6°F (12°C), signal output is on.

• and room temperature (Tr) increases above 69.8°F (21°C), signal output is off.

• and room temperature (Tr) decreases below 66.2°F (19°C), signal output is on.

• and room temperature (Tr) decreases below 50°F (10°C), signal output is off.

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Auxiliary heater control 2