Daikin Aurora Series Service Manual page 100

Outline of Control (Indoor Unit)
9.12.2 Heat Pump Lockout Control
For heating operation, users can select to use electric heater. For this, signals are sent using ABC
terminal of outdoor unit PCB.
When the hot-water heating signal is received from the outdoor unit PCB, heating operation is
performed only with the electric heater as manual backup operation. The ON/OFF conditions for
the electric heater are shown below.
∗1. The heater backup prohibiting conditions are prioritized. Even when the heater ON conditions
Notes:
∗2. When the remote controller is ON, Time-up will be set to the initial value.
87
• Thermostat step 2: ON
• Time up
&
• Electric heater capacity
setting: Setting available
Condition A
• Heating or automatic heating mode
• Thermostat step 1: ON
• No fan motor system error
&
• Hot-water heater: 1 (ON)
• Heater backup prohibiting conditions (∗1) not met
(Elimination of Condition B)
Condition B: Heater backup prohibiting conditions (∗1)
• Indoor unit error (Abnormal stop)
• Indoor unit error (Remote controller thermistor error)
OR
• Indoor unit error (Remote sensor error)
• Electric heater capacity setting: 01 (No heater kit)
are met, the heater is turned OFF when the prohibiting conditions are met.
Thermostat OFF/Operation OFF
ENTRY/
5 minutes timer starts.
• Condition A
&
• Time up (∗2)
H/P Heating: Not in operation
Heater 1: ON
Heater 2: OFF
Fan: ON
Entry/
5 minutes timer starts.
• Thermostat step 2: OFF
• Electric heater capacity setting:
OR
H/P Heating: Not in operation
Heater 1: ON
Heater 2: ON
(OFF for single heater)
Fan: ON
Elimination of
Condition A
Setting not available
Elimination of
Condition A
Functions and Control
SiUS341802E