Service Timers
A user may override timers for a period of up to 240 minutes
by setting the Service Timer to a non-zero number. When the
Service Timer is not zero, the times listed below are set to the
Service Time (Default = 20 seconds) instead of the normal
values. This allows the unit to be run through its operating
states without having to wait for the normal time delays to
expire. These times revert to the standard values when the
Service Time count down to zero or is set to zero by the user.
The affected times are:
• Cooling Stage Time
• Heating Stage Time
• Start Initial Time
• Recirculation
• ZeroOATime
Rapid Start
The user may elect to initiate a rapid startup sequence at unit
power up by setting the Rapid Start ag to Yes. When this ag
is set to Yes, the Service Timer is set to 10 minutes whenever
the power is reset to the controller.
Manual Control
A user may manually control outputs to check operation of
components when Manual Control is set to ManCtrl. When
Manual Control is set to ManCtrl, the unit is disabled and
the unit is shut down in the normal manner if it is operating.
Outputs listed in the Manual Control menu of the Keypad/
Display section can then be controlled directly until Manual
Control is set to Normal.
NOTE: Manual Control will be set to No automatically after
240 minutes so that a person could not put the unit
into Manual Mode control and walk away from the unit
and let it run at the manual settings.
When Manual Control is set to Yes, the Control Mode is set to
Off so that the unit will not restart automatically.
When Manual Control is set to Normal all digital outputs in the
Manual Control menu are set to Off and all the analog outputs
are set to 0.0% so that all outputs are in the Off or minimum
position when Manual Control is set to ManCtrl.
All alarms except those listed below are overridden during
Manual Control.
During manual control, the unit will respond in the normal
manner to the following alarms.
• Emergency Stop Fault
• Duct High Limit
• High Return Temperature
• High Discharge Temperature
• Low Discharge Temperature
• High Pressure - Circuit # 1
• High Pressure - Circuit # 2
• Low Pressure - Circuit # 1
• Low Pressure - Circuit # 2
usIng The Keypad/dIsplay
www.DaikinApplied.com 7 OM 920-6 • MICROTECH UNIT CONTROLLER