Forced Operating Mode (Emergency Operation) - Daikin R-410A Service Manual

ESIEN05-04
1.3

Forced Operating Mode (Emergency Operation)

Purpose The table below describes the purpose of the forced operating mode.
If...
Starting conditions You can operate the system manually by changing the emergency switch on the indoor and outdoor
PCB from "normal" to "emergency". When the system is operating in "emergency" it can not control
the room temperature.
Both the indoor and outdoor unit must be set to "emergency" while the power is off.
Ending conditions You can end the emergency operation by changing the "emergency" switch back to "normal" while the
power is OFF.
Emergency Below table explains what will happen when the switch is set to "emergency":
operation
Changing the switch to "emergency" for the...
Indoor unit
Outdoor unit
How to set To set emergency operation, proceed as follows:
Emergency
Operation Step
1
2
Part 2 – Functional Description
R/C is defective
Indoor PCB is defective
Outdoor PCB is defective
Action
Turn OFF the power.
Switch ON the emergency switch (SS1) on the indoor PCB.
Normal
Emergency
Then...
Forced operating mode can be used to go to cooling or heat-
ing. In forced operating mode, the compressor is forced to
operate until the defective indoor or outdoor PCB is back
online.
Switches ON the...
Indoor fan(s)
Drain pump
Compressor
Outdoor fan(s)
Functional concept
1
2
3
4
5
2–5