Other Control; Demand Operation; Heating Operation Prohibition - Daikin RXYQ96PYDN Service Manual

Other Control

9. Other Control
9.1 Backup Operation
If any of the compressors goes wrong, disable the relevant compressor or the relevant outdoor unit
from operating, and then conduct emergency operation only with operational compressors or
outdoor units.
Emergency operation with remote controller reset and Emergency operation with outdoor
unit PC board settings are available.
Applicable model
(1) Emergency operation with remote controller reset
[Operating method]
[Details of operation]
(2) Emergency operation with outdoor unit PC board setting
[Setting method]
For details of the setting method, refer to page 264.[Details of operation]
9.2

Demand Operation

In order to save the power consumption, the capacity of outdoor unit is saved with control forcibly
by using Demand 1 Setting or Demand 2 Setting.
To operate the unit with this mode, additional setting of Continuous Demand Setting or
external input by external control adapter is required.
Demand 1
Demand 2
9.3

Heating Operation Prohibition

Heating operation is prohibited above 75.2°F ambient temperature.
218
Operating method
REYQ72 ~ 120PYDN
REYQ72~144PTJU
REYQ144 ~ 240PYDN
REYQ168~240PTJU
Reset the remote controller. Press the RUN/STOP button for 4 seconds or more.
Disable the defective outdoor unit from operating, and then only operate other outdoor units.
On systems with 1 outdoor unit, this emergency operation is not available.
Change the setting of the compressor to the emergency operation setting as explained in
Section 12, Field Setting on Page 95 in Section 2.
Disable the compressor with the operation disable setting and only operate other
compressors.
Set item Condition
Mode 1
Mode 2
Mode 3
⎯
(1) Emergency operation with
remote controller reset
(Auto backup operation)
–
Backup operation by the indoor
unit
The compressor operates at approx. 60% or less of rating.
The compressor operates at approx. 70% or less of rating.
The compressor operates at approx. 80% or less of rating.
The compressor operates at approx. 40% or less of rating.
SiUS34-801A_b
(2) Emergency operation with
outdoor unit PC board setting
(Manual backup operation)
Backup operation by the
compressor
Backup operation by the
outdoor unit
Content
VRVIII R-410A Heat Recovery 60Hz