Daikin R-410A Service Manual page 144

Functional concept
1
2
3
4
5
Active components
Additional info
2–6
Step Action
3 Switch ON the emergency switch on the outdoor PCB.
4 Set the emergency switch on the outdoor PCB to the forced mode you prefer (Cooling or
Heating).
5 Turn ON the power supply.
Component Forced cooling
Compressor ON
4-way valve OFF
Outdoor unit fan H fan speed
Indoor unit fan H fan speed
Drain pump ON
During emergency operation, do not attempt to operate the equipment from the remote control. The
remote control shows "88" while the emergency operation is active on the indoor unit
If a safety device is activated during emergency, all actuators are turned OFF
In cooling, the unit runs for 20 min and then stops for 10 min in order to avoid freeze-up of the
indoor coil.
In heating, defrost is activated for 3 minutes once every hour.
Emergency operation can not be carried out when the PCB board itself is defective.
Be sure to set the emergency switch on both the outdoor and indoor unit.
The unit will not regulate the temperature during emergency operation.
Change the position of the emergency switch only when the power is turned off.
Forced heating Forced defrosting
ON ON
ON OFF
H fan speed OFF
H fan speed H fan speed
OFF ON
Part 2 – Functional Description
ESIEN05-04