Electra WNG 50 DCI Service Manual page 75

1.6 Technician Test Mode (Valid For Single Units by
Connecting HMI Display only )
This test is aimed for the technicians to check the system under a preset compressor and
outdoor fan values while the expansion valves will function according to the normal running
mode.
12.6.1 Entering technician mode
o This mode is entered through the outdoor unit using the HMI (refer to user interface
section).
o
It can be selected either for cool or heat.
o Technician test is not possible to enter during deicer.
12.6.2 Technician mode procedure
•
All the connected indoor units will enter technician test at high indoor fan speed.
•
The outdoor unit will be working normally (according to the run mode control logic) except the
following changes:
o The dry contacts inputs will be ignored.
o Protections will be operative for stop compressor (not to be implemented in the current
version).
o The compressor and the outdoor fan will be working in target preset values according to the
following table:
Unit
DCI 72/80
12.6.3 Exiting technician mode
Technician mode will be exited either when:
o Escaping by the HMI (exiting the ttC or ttH menus)
o 60 minutes are passed from entering
Service Manual - WNG 50_60_80 DCI
Technician Test
Compressor Speed
Cool Heat
60 75
Revision Y05-02
CONTENT
CONTROL SYSTEM
OFAN speed
700 RPM
12-19