HEAT PUMP PROHIBITION CONTROL
Perform heating by external heater only. VRF indoor unit is Continuous thermostat OFF.
Operation Condition
Heater ON ▪ Heater ON as shown in diagram of heating temperature
Heater
OFF
DIP-SW2-3 ON
Indoor unit fan
setting for external
heater: Enable
▪ Heater OFF as shown in diagram of heating temperature
▪ Other than Heating mode
▪ Error occurred
▪ Forced thermostat off
▪ Fan stop protection
DIP-SW2-3 OFF
Indoor unit fan
setting for external
heater: Disable
▪ Heater OFF as shown in diagram of heating temperature
▪ Other than Heating mode
▪ Error occurred
▪ Forced thermostat off
▪ Temperature of heater ON (Thon) ... Adjustable by Function setting No.62 (Operating
temperature switching of external heaters).
▪ All control temperatures will shift by adjusting "Thon".
Tr: Room temperature
Ts: Set temperature
Thon: Heater ON temperature
OFF
ON
Tr-Ts ≥ 0.9°F
(0.5°C)
Tr-Ts
Tr-Ts (=Thon) ≤ -0.9°F
(
-0.5°C)
- (08 - 36) -
EXTERNAL INPUT
& OUTPUT
EXTERNAL INPUT
& OUTPUT
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