Heater Control (Optional Pcb Krp1B Series Is Required.) - Daikin VRV RXYMQ-A Series Service Manual

Outline of Control (Indoor Unit)

8.13 Heater Control (Optional PCB KRP1B series 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 below.
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) is conducted through the liquid pipe temperature (R2T) of the
2. The heater control (ON/OFF) is conducted by converting the heater temperature into the
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
82
ON
indoor unit.
ON
condensing pressure equivalent saturated temperature (Tc) according to the temperature
detection through the high pressure sensor (S1NPH) of the outdoor unit.
ON
Set temperature
2ºC 2ºC
43ºC 50ºC Liquid pipe temperature
50ºC 60ºC
OFF
OFF
Condensing pressure
equivalent saturated
temperature
OFF
Part 4 Functions and Control
SiME332106E