Daikin PreciseLine Series Installation And Maintenance Manual page 53

Servicing High Voltage Control Panel
Components
DANGER
LOCKOUT/TAGOUT all power sources prior to servicing the unit. Hazardous
voltage may cause serious injury, death, and property damage. Disconnect
electric power before servicing equipment. More than one disconnect may
be required to de-energize the unit.
Disconnect all electric power to the unit when servicing control
panel components. Unless power is disconnected to the unit,
the components remain energized. Always inspect units for
multiple disconnects to ensure all power is removed from the
control panel and its components before servicing.
Before Start-up
1. Verify that the unit is completely and properly installed
with ductwork connected.
2. Verify that all construction debris is removed, and that
the filters are clean.
3. Verify that all electrical work is complete and properly
terminated.
4. Verify that all electrical connections in the unit control
panel and compressor terminal box are tight, and that the
proper voltage is connected.
5. Verify all nameplate electrical data is compatible with the
power supply.
6. Verify the phase voltage imbalance is no greater than
+/- 3%.
7. Manually rotate all fans and verify that they rotate freely.
8. Verify all fasteners on the fan assemblies are still tight.
9. Verify that the evaporator condensate drain trap is
installed and that the drain pan is level.
10. If unit is curb mounted, verify that the curb is properly
flashed to prevent water leakage.
11. Before attempting to operate the unit, review the control
layout description to become familiar with the control
locations.
12. Review the equipment and service literature, the
sequences of operation, and the wiring diagrams to
become familiar with the functions and purposes of the
controls and devices.
13. Determine which optional controls are included with the
unit.
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MicroTech 4 Lite Unit Operation
Initial Manual Mode Start-Up
Initial Start-up should be performed in manual control mode
before proceeding to the cooling/heating start up.
Power Up
1. Close the unit disconnect switch. Power should now be
supplied to the control panel, and the LEDs on MCB1
should follow the normal startup sequence.
Supply Fan Start-up
1. Verify all duct and unit mounted isolation dampers are
open.
2. Place the unit in the Off Mode in order to initiate the
Manual Control Mode through the keypad menu.
Menu\Manual Control\Ctrl Mode = Off
3. Place the unit into Manual Control Mode through the
Main Menu\Manual Control\Manual Ctrl =
keypad menu
Enabled
4. Activate the fan through the keypad menu
Manual Control SAF Cap Cmd = 40%
\
a. Check Fan rotation for proper rotational direction
4. Speed the fan up through the keypad menu
Manual Control\SAF Cap Cmd = 100%
a. Check the manual motor protectors or that the
circuit breakers have not tripped.
b. Check the phase monitor.
OA Damper Start-up
1. Open the outdoor air damper through the keypad menu:
Main Menu\Manual Control\OA Damper Pos=30%.
a. Verify that the OA damper position moved and the
Return air damper (if present) also moved.
b. Leave OA damper Open for next step
Exhaust Fan Start-up
1. Verify all duct and unit mounted isolation dampers are
open.
2. Activate the fan through the keypad menu
Manual Control\Exh Fan Cmd = 40%
a. Check fan rotation for proper rotational direction
3. Speed the fan up through the keypad menu
Manual Control\Exh Fan Cap Cmd = 100%
a. Check the manual motor protectors or that the
circuit breakers have not tripped.
b. Check the phase monitor.
Leaving Manual Control when complete through the keypad
Main Menu\Manual Control\Manual Ctrl = Normal
menu:
53 IM 1267-7 • PRECISELINE AIR HANDLER
Main
Main Menu\
Main Menu\
Main Menu\
Main Menu\