Daikin REYQ-XA, Руководство по обслуживанию, Страница: 166 / 441

Outline of Control (Indoor Unit) SiUS371901E
153 Functions and Control
9.11 Heater Control (Except FXTQ-TA Models)
Note: Optional PCB KRP1B ... is required.
The heater control is conducted in the following manner.
Normal control While in heating, the heater control (ON/
OFF) is conducted as shown on the right.
Overload control
When the system is overloaded in
heating, the heater will be turned
OFF in the following 2 manners.
(1) The heater control (ON/OFF) is
conducted through the liquid
pipe temperature (R2T) of the
indoor unit.
(2) The heater control (ON/OFF) is
conducted by converting the
heater temperature into the
condensing pressure equivalent
saturated temperature (Tc)
according to the temperature
detection through the high
pressure sensor (S1NPH) of the outdoor unit.
Fan residual
operation While the heater turns OFF, in order to prevent the activation of the thermal protector, the fan
conducts residual operation for a given period of time after the heater turns OFF. (This operation is
conducted regardless of with or without heater equipped.)
Residual operation time: 100 seconds on ceiling suspended type or 60 seconds on other types
ON Set temperature
OFF
2˚C
(3.6˚F)
2˚C
(3.6˚F)
ON 43˚C (109.4˚F)
OFF
50˚C (122˚F)
Liquid pipe temperature
ON 50˚C (122˚F) 60˚C (140˚F)
OFF
Condensing pressure
equivalent saturated
temperature