York CIDM030B21E, Service Manual

Page: 115 / 144

SM-16005-rev.2
5-27
EXTERNAL INPUT/OUTPUT AND FUNCTION SETTING
(35) Not Prepared (d6)
(36) Damper Minimum Opening (d7)
This function is used to set the fresh outdoor air damper minimum opening selection.
(37) All Fresh Operation (E1)
This function allows to the outdoor air damper to be opened.
(32) Power Supply ON/OFF 2 (Restarting Function After Power Failure) (d3)
This function is utilized to restart the unit operation automatically when the power supply is restored
after a power failure of over 2 seconds. In case of power failure for 2 seconds or less, the standard
unit retains all the operational functions and restarts the operation automatically. (The compressor
restarts operation after 3 minutes guard in addition to power failure time for up to 2 seconds.)
When this function is utilized in the condition that there is no person to operate the unit, monitor the
system for potential unit failure.
NOTES:
1. If power failure occurs during the stoppage of the unit, the unit remains stopped after the power
supply is restored.
2. When the compressor does not reach the fixed temperature, the system may not restart
automatically after turning on the power supply by hot-start control.
*Hot-start Control: The control program that does not operate the compressor even after the
power is turned ON if the compressor does not reach the fixed temperature.
(33) Prevention for Cooling Discharge Air Temperature Decrease (d4)
This function is utilized to prevent discharge air temperature decrease during the cooling operation by
controlling Thermo-ON/OFF according to the discharge air temperature.
● Thermo-ON:
COOL/DRY operations continue for 3 minutes when discharge air temperature at 52
o
F (11
o
C) or lower.
● Thermo-OFF:
The room temperature reaches the setting temperature when discharge air temperature at 56
o
F (13
o
C)
or higher.
(34) Prevention for Heating Discharge Air Temperature Decrease (d5)
This function is utilized to prevent discharge air temperature decrease during the heating operation by
making the actual fan speed lower than the speed indicated on the wired controller.
NOTE:
The above table shows when the optional function setting “Hi Speed” is set as standard (00) by the
wired controller.
Large Fan Speed Small
Indications on
Wired Controller
HIGH2 HIGH MED LOW
Actual Fan Speed HIGH HIGH LOW LOW