SiAF332111E Field Settings for Outdoor Unit (6/8 HP Models)
Part 5 Field Settings and Test Operation 141
2: Quick. Undershoot during cooling operation is allowed compared to the requested
refrigerant temperature, in order to achieve the required room temperature very fast.
The overshoot is allowed from the start up moment. In case of cooling operation the
evaporating temperature is allowed to go down to 6°C on temporary base depending
on the situation. When the request from the indoor units becomes more moderate, the
system will eventually go to the steady state condition which is defined by the
operation method above.
3: Powerful. Undershoot during cooling operation is allowed compared to the
requested refrigerant temperature, in order to achieve the required room temperature
very fast. The overshoot is allowed from the start up moment. In case of cooling
operation the evaporating temperature is allowed to go down to 3°C on temporary
base depending on the situation. This setting is used in conjunction with setting 2-8.
The graph below shows the different patterns of target Te according to setting 2-81 “cooling
comfort setting”
Mode 2-83: Allocation of cool/heat master logic. When system contains VRV DX indoor
and RA indoor (through BP units), it is required to assign the cool/heat change over logic to
follow.
Default value: 1. RA cool/heat master logic. Any RA indoor unit that is switched first, is
assigned as cool/heat master as long this unit is in operation (regardless thermostat
status). Only when this indoor unit is switched OFF operation (by remote controller),
other indoor unit can become cool/heat master:
Priority is given to indoor unit operating in the same mode as the previous cool/heat
master switched OFF operation.
Only no more indoor unit operate in the same mode as the previous cool/heat master,
other RA indoor unit can become cool/heat master to switch to the other operation
mode.
RA indoor unit that is operating, but demanding the other operation mode set by the
cool/heat master, enters the “stand-by mode”: operation LED blinks.
VRV indoor unit change the operation mode immediately when outdoor unit receives
change of operation mode from the current cool/heat master RA indoor unit.
Field Setting 0: VRV cool/heat master logic.
At time of first startup, or when cool/heat master was released, one of connected VRV
DX indoor unit can be assigned cool/heat master. The symbol “locked cool/heat
selector” blinks. In case of wireless controller kit is used, the green clock LED
blinks on the receiver.
Confirm cool/heat master to a VRV DX indoor unit: press once the cool/heat selector
button
on the remote controller of the indoor unit to be set as cool/heat master.
Mode 2-90: Indoor unit without power U4 error generation. In case an indoor unit needs
maintenance or repair on the electric side, it is possible to keep the rest of the VRV DX
indoor units operating without power supply to some indoor unit(s).
Default value: 0. Not active.
Target
Te
Te 6°C
Te 3°C
Refrigerant temperature
time
Powerful mode
Quick mode
Mild mode
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