Daikin VRV RXYQ72-384XAYCA, Service Manual

Page: 132 / 419

Outline of Control (Indoor Unit) SiUS342004EB
125 Part 4 Functions and Control
Note(s)
9.12 Heater Control (FXTQ-TA, FXTQ-TB Models)
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 130.)
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/A u tomatic heating
• A u xiliary heater ena b led: 1
• Not in heating/A u tomatic heating
• A u xiliary heater ena b led: 0 (
∗
3)
Heater not allowed
Heater allowed
Heater 1: OFF
Heater 2: OFF
OR
OR
OR
Thermostat OFF/Operation OFF
Heater 1: OFF
Heater 2: OFF
Thermostat OFF
Thermostat ON
Thermostat ON
Condition C
Condition B
Condition B
Thermostat OFF
H/P Heating: In operation
Heater 1: OFF
Heater 2: OFF
Fan: ON
H/P Heating: In operation
Heater 1: ON
Heater 2: OFF
Fan: ON
H/P Heating: In operation
Heater 1: ON
Heater 2: ON
(OFF for single heater)
Fan: ON
H/P In defrost/oil ret u rn
Heater 1: ON
Heater 2: OFF
Fan: ON
ENTRY/
5 min u tes timer starts.
ENTRY/
5 min u tes timer starts.
• Not Condition A
• Thermostat step 2: OFF
• Condition A
• Time
u p
• Thermostat step 2: ON
Not Condition A
Not Condition B
• Thermostat step 3: OFF
• Electric heater capacity setting:
Setting not a v aila b le
• Thermostat step 3: ON
• Time
u p
• Electric heater capacity
setting (
∗
5): Setting a v aila b le