Electra DCI 80, Service Manual

Page: 53 / 162

11-16
CONTROL SYSTEM
Revision Y05-02
Service Manual - WNG 50_60_80 DCI
11.26 Test Mode
11.26.1
Entering Test Mode
System can enter Test mode in two ways:
Automatically when the following conditions exists for 30 minutes
continuously:
o
Mode = Cool, Set point = 16, Room temperature = 27±1, Outdoor
temperature = 35±1
Or
o
Mode = Heat, Set point = 30, Room temperature = 20±1, Outdoor
temperature = 7±1
Manually when entering diagnostics with the following settings:
o
Mode = Cool, Set point = 16
o
Mode = Heat, Set point = 30
11.27 Unit Operation in Test Mode
In test mode, the unit will operate in fixed settings according to the indoor fan
speed setting:
During test mode, protections are disabled, except for stop compressor status.
Indoor Fan Speed Setting Unit Setting
Low Minimum Capacity Setting
High Nominal Capacity Setting
Auto Maximum Capacity Setting
11.28 Additional Functions and Rules (for DUAL split models)
The DCI SW is fully parametric.
All the model dependent parameters are shown in Blue color and with Italic style
[ parameter ].
The parameters values are given in the last section of this control logic chapter of
the service manual.
11.29 System Control Concept
All indoor unit related items control remains the same as in single split
applications.
All outdoor units related control logic remains the same as in single split
applications.
The MSMP controller is responsible only for the following control:
Setting of system operation mode (cool/heat)
Setting the NLOAD for the outdoor units
Controlling of the EEV’s
Dry contacts control
11.30 Compressor Frequency Control
11.30.1
Outdoor Unit NLOAD setting