
Designation: AIR CONDITIONER FOR ELECTRICAL ENCLOSURE Page 16/20
UMA-CDZ-AVC035xxAE-03
2) Press the Set button again to display the parameter value of St, and modify the temperature set-
point by pressing or .
WARNING: temperature which unit starts to work is St+C1. For example: St=31, C1=4 compressor and
condenser fan turn on at 35°C (31°C+4°C)
Parameter adjustment
1) When St shows, press to display Po, and press Set to display 00; at this moment, use the
button or to input the password of administrator menu (55).
2) After inputting the password 55, press Set to display Po. The controller will automatically verify
whether the password is correct.
3) When it passes verification, press or to select parameter items St, Po, C1, C2……U3 (i.e.
any parameter item of user menu and administrator menu); otherwise, the controller will only stay at
the parameter items St and Po without displaying other parameter items.
4) After selecting the menu, press Set to enter the current menu and set its parameters. Use or
to adjust parameter values, then press Set again to return to menu selection status.
5) Under any parameter setting status, press or press no button for 30 sec to exit parameter setting
and save the current parameter value automatically.
Note: The password of administrator menu is valid for once. After exiting parameter settings by
pressing , correct password must be entered again before adjusting parameters.
Control output
Refrigeration:
In normal status:
Refrigeration starts when the cabinet temperature > temperature set-point (St) + control differential (C1), and
the indicated time must elapse between two successive minimum switch-ons of the compressor.
Refrigeration stops when the cabinet temperature < temperature set-point (St).
In case of cabinet sensor fault,
When A1=0, compressor start and stop time in the mode of “run/stop in a proportional time” is disabled,
refrigeration stops.
When A1=1, compressor start and stop time in the mode of “run/stop in a proportional time” is enabled,
refrigeration performs in cycle according to the set refrigeration start (A2) and stop (A3) time in the mode of
“run/stop in a proportional time”.
Alarm
The display shows E1 when cabinet sensor faults.
When buzzer switch (A4)=1, the controller alarms and the buzzer beeps. The buzzer mutes when all the
alarm is excluded or by pressing any button.
When new alarm occurs, the buzzer beeps again.
E1 Cabinet sensor fault
E2 Evaporator sensor fault
E2C
Evaporator sensor is shut down, but the measured
temperature value of evaporator sensor is selected to
show.
Er Programming failure of copy card
EP The data in copy card is inconsistent with the controller
model, so programming fails.
Wiring diagram