Emicon EMIBYTE DXi.H, Use And Maintenance

Page: 78 / 82

Rev. 3 02-2021
78
MTEC.DXi.H/DXi.HF.GB-3 Use and Maintenance technical manual DXi.H/DXi.HF English
Emibyte DXi.H/DXi.HF
Direct expansion close control
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1. The unit doesn’t work
a. The electrical panel is not powered
Check the voltage of each phase of the
main supply line
Check the main switch is closed (I position)
b. The auxiliary circuit is not powered
Check the fuses of the auxiliary circuit
(refer to the attached wiring diagram)
c. The microprocessor doesn’t start he unit
Check the electrical connections of the
microprocessor
Check the set values of the temperature
d. The external impulse fails at the unit
starting
Check the remote ON/OFF switch is closed
(refer to the attachd wiring diagram)
Ebable the external impulse from the user
terminal (display) when the unit starts
2. Room temperature too high (high tempe-
rature alarm signal
a. The unit doesn’t work Refer to point 1
b. The control system setting is incorrect Check the control system calibration
F7KHDLUÀRZLVLQVXI¿FLHQW Refer to point 6
d. The compressor doesn’t work Refer to point 10
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Refer to point 13
Refer to point 14
Refer to point 15
f. The reheating system doesn’t work
properly (if present)
Refer to point 7 and 16
g. The control system doesn’t work Refer to the attached Controller Manual
h. Thermal load higher than estimated Check the room thermal load
3. Room temperature too low (low tempera-
ture alarm signal)
a. The control sistem setting is incorrect Check the control system calibration
b. The reheating system doesn’t work
properly (if present)
Refer to point 7 and 8
c. The control system doesn’t work Refer to the attached Controller Manual
d. Thermal load higher than estimated Check the thermal looss value
4. Room humidity too high (high humidity
alarm signal)
a. The control system calibration is incor-
rect
Check the control system calibration
b. Latent load higher than estimated Check the room latent load
c. The compressor doesn’t work when the
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Refer to point 10
d. The control system doesn’t work (if DH
option is installed)
Refer to the attached Controller Manual