Service manual

15-15
CONTROL SYSTEM > GC 24
SM HADDCI 1-A.2 GB
15.5 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.
15.5.1 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.
15.5.2 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:
Technician Test
Unit
Compressor Speed
OFAN speed
Cool Heat
Trio 60 75 High speed
Quattro 60 75 High speed
15.5.3 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
15.6 User Interface
LEDs Indicators - single split only
If any fault exists in the system, it will be shown according to tIf no fault exists in the system, no fault code
will be displayed during normal operation mode, and the status led will be on while the compressor is enable.
he following coding method.
Two LEDs display the system diagnostics on real time as follows:
STATUS LED is blinking 5 times in 5 seconds, and shut off for the next 5 seconds.
FAULT LED will blink during the same 5 seconds according to the following table:
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