Heater Control (Fxtq-Ta, Fxtq-Tb Models) - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

Outline of Control (Indoor Unit)

9.12 Heater Control (FXTQ-TA, FXTQ-TB Models)

Note(s)
Optional heater kit HKS... is required.
For FXTQ-TA and FXTQ-TB models, heater ON/OFF output from wiring adaptor interlocks with the
operation of heater kit HKS...(When the heater 1 turns ON/OFF, heater output of wiring adaptor
turns ON/OFF.). Fan residual operation also interlocks with the fan residual operation of heater kit
HKS.... The residual time will be 90 seconds. (Refer to Fan Control (Heater Residual) (FXTQ-TA,
FXTQ-TB Models) on page 134.)
9.12.1 Auxiliary Electric Heater Control
If heating is insufficient in heat pump system alone, an electric heater is to be used as the auxiliary
heater. The following shows the ON/OFF conditions for the electric heater.
• Heating/Automatic heating
&
• Auxiliary heater enabled: 1
Heater allowed
• Condition A
& • Time up
• Thermostat step 2: ON
H/P Heating: In operation
5 minutes timer starts.
• Thermostat step 3: ON
• Time up
&
• Electric heater capacity
setting (∗5): Setting available
129
Heater not allowed
Heater 1: OFF
Heater 2: OFF
Thermostat OFF/Operation OFF
Thermostat ON
H/P Heating: In operation
Heater 1: OFF
Heater 2: OFF
Fan: ON
ENTRY/
5 minutes timer starts.
Condition B
Heater 1: ON
Heater 2: OFF
Fan: ON
ENTRY/
H/P Heating: In operation
Heater 1: ON
Heater 2: ON
(OFF for single heater)
Fan: ON
• Not in heating/Automatic heating
OR
• Auxiliary heater enabled: 0 (∗3)
Heater 1: OFF
Heater 2: OFF
Thermostat OFF
Thermostat ON
H/P In defrost/oil return
Heater 1: ON
Heater 2: OFF
Condition B
• Not Condition A
OR
• Thermostat step 2: OFF
• Thermostat step 3: OFF
• Electric heater capacity setting:
OR
Setting not available
Thermostat OFF
Condition C
Fan: ON
Not Condition B
Not Condition A
Part 4 Functions and Control
SiUS341802EC