11-13
CONTROL SYSTEM
SM DUODCI 1-A.1 GB
11.21 Test Mode
11.21.1 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
11.21.2 Unit Operation in Test Mode
In test mode, the unit will operate in fixed settings according to the indoor fan speed setting
:
Indoor Fan Speed Setting Unit Setting
Low Minimum Capacity Setting
High Nominal Capacity Setting
Auto Maximum Capacity Setting
During test mode, protections are disabled, except for stop compressor status.
11.22 Additional Functions and Operating Rules (for DUAL
split modeBS)
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.
11.22.1 System Control Concept
All indoor unit related items control remains the same as in single split applications.
All outdoor unit 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
11.22.2 Compressor Frequency Control
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