Heater Control (Optional Pcb Krp1B - Daikin RTSQ20PY1 Service Manual

Outline of Control (Indoor Unit)
9.5 Heater Control (Optional PCB KRP1B...is required.)
The heater control is conducted in the following manner.
[Normal control]
While in heating operation, the heater
control (ON/OFF) is conducted as
shown on the right.
[Overload control]
When the system is overloaded in
heating operation, the heater will
be turned OFF in the following two
manners.
(1) The heater control (ON/OFF)
(2) The heater control (ON/OFF)
[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
125
is conducted through the liquid
pipe temperature (R2T) of the
indoor unit.
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.
ON
ON ON 43ºC
ON 50ºC
SiBE31-801_C
Set temperature
2ºC 2ºC
50ºC Liquid pipe temperature
OFF
Condensing pressure
60ºC
equivalent saturated
temperature
OFF
Function
OFF