Forced Operating Mode (Emergency Operation) - Daikin RZQ71~125B7V3B Service Manual

General Functionality
1.3

Forced Operating Mode (Emergency Operation)

1
Purpose
2
Starting conditions
3
Ending conditions
4
Emergency
operation
5
How to set
Emergency
Operation
2–6
The table below describes the purpose of the forced operating mode.
If...
R/C is defective
Indoor PCB is defective
Outdoor PCB is defective
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.
You can end the emergency operation by changing the "emergency" switch back to "normal" while the
power is OFF.
Below table explains what will happen when the switch is set to "emergency":
Changing the switch to "emergency" for the...
Indoor unit
Outdoor unit
To set emergency operation, proceed as follows:
Step Action
1 Turn OFF the power.
2 Switch ON the emergency switch (SS1) on the indoor PCB.
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...
Normal
Indoor fan§
Drain pump
Compressor§
Outdoor fan(s)
Part 2 – Functional Description
ESIE04-01