Emergency Operation; Forced Operation - Daikin RZQ Series FCQ20EVA Service Manual

Emergency Operation

4. Emergency Operation

4.1

Forced Operation

Emergency Operation of Indoor Units
You can operate the system manually by changing the setting of the emergency switch (SS1) on the indoor
unit's PCB from "Normal" to "Emergency." When switched however the equipment cannot regulate
temperature. The table below contains a list by model of actuators for manually operating indoor units in time
of emergency.
FCQ, FBQ
 Method of switching in time of emergency
Note:
1. Do not operate from remote controller during emergency operation.
2. Operate the switch only when the power supply is turned OFF.
Emergency Operation of Outdoor Units
Turn OFF the power supply and set the emergency switch to ON and "Heat" for heating or "Cool" for cooling.
Operation will be started manually when you restart the power. ("Heat" cannot be set for a cooling only air
conditioner.)
Concerning Emergency Operation
If a safety device should be actuated during emergency operation, all actuators are turned OFF. If you reset
after waiting for 3 minutes, operation will start again. Emergency operation cannot be carried out if the PCB
itself is defective.
Note:
For emergency operation, be sure to set emergency operation for both the indoor and outdoor units. Do not
attempt to operate the equipment from the remote controller during emergency operation. Emergency
operation is computer-controlled, and therefore cannot be carried out if the micro-computer is not operating
properly.
The table below contains a list of actuators for manually operating the equipment in time of emergency.
Actuator
Compressor
Four way valve
Indoor Unit Fan
Drain Pump
During emergency heating operation, defrosting is carried out for 3 minutes every hour. (four way valve,
outdoor unit fan and indoor unit fan are turned OFF.)
67
Model
DS1 SETTING
ON COOL
COOL
or
HEAT
OFF HEAT
Factory Setting
Fan

Normal
Emergency
ON COOL ON
OFF HEAT OFF
Forced Forced
Cooling Heating
Cooling
ON
OFF
H Fan Speed
ON
SiME281501E
Drain Raising

COOL
HEAT
Heating
ON
ON
H Fan Speed
ON
Field Setting