Service manual

CONTROL SYSTEM
11.6 Installation Test Mode
See “A APPENDIX”.
11.7 Technician Test Mode
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.
11.7.1 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.
11.7.2 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 tab
le:
Technician Test
Unit
Compressor Speed
OFAN speed
Cool Heat
Trio 60 75 High s
peed
Quattro 60 75 High s
peed
11.7.3 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
Revision 0
11-19