Aprilaire 4517 User manual

! WARNING
1. 120-Volts can cause serious injury or death. Unplug the dehumidifier before servicing.
! CAUTION
1. Failure to follow installation instructions can result in damage to the dehumidifier. Service is to be performed only by qualified
HVAC contractors and technicians.
REMOVE THE EXISTING BOARD
1. TURN THE ON/OFF SWITCH OFF, ROTATE
THE CONTROL KNOB TO OFF AND UNPLUG
THE UNIT BEFORE SERVICING. LEAVE
UNPLUGGED UNTIL REPLACEMENT IS
COMPLETE.
2. Remove the filter door and side panel from the right
side of the unit (power switch is to the left when
viewing the right side of the unit –see Figure 1). Set
both aside.
3. Disconnect the 120-volt connections from the power
board (see Figure 2). Use a pliers to remove the quick
disconnect terminals straight out. If terminals must be
“wiggled” to remove, use as little side to side
movement as possible –too much wiggling can cause the terminal to
pull out of the board.
4. Remove the two screws securing the power board mounting
bracket to the dehumidifier.
5. Disconnect the ribbon cable.
6. Models 1710A, 1750A & 1770A only –Remove the two (2) black
limit switch leads and the daughter board from the power board –
it will be reinstalled on the replacement power board (see Figure
3).
7. Remove the remaining screws securing the power board to the
mounting bracket.
Installer Note: There is a plastic spacer between the board and
mounting bracket secured by the large center mounting screw –
this must be reused to mount the replacement board.
INSTALL THE NEW POWER BOARD
1. Secure the replacement board to the mounting bracket
using three (3) smaller screws and one large center
screw.
Important: Install the white spacer between the board
and mounting bracket when installing the large center
screw.
2. Models 1710A, 1750A & 1770A only –Align the
daughter board socket with the pins on the power
board and secure the daughter board with the
remaining small mounting screw.
MODEL 4517 POWER BOARD
REPLACEMENT INSTRUCTIONS
Figure 1- Right Side View
Figure 3 –Power Board Connections
Figure 2 - Power Board Installed in Dehumidifier

3. Models 1710A, 1750A & 1770A only –Reconnect the two (2) black limit switch leads.
4. Reconnect the ribbon cable. The ribbon cable must be properly oriented with the pin header.
5. Secure the power board mounting bracket to the dehumidifier using two (2) screws.
6. Reconnect the power, blower and compressor wires to the power board. Ensure that the quick connect terminals are fully
engaged.
IMPORTANT: The power, blower and compressor wires are color coded, make sure the proper colored wire is attached to the
terminal with the corresponding color label.
7. Install the side panel and filter door.
TEST THE DEHUMIDIFIER
1. Plug in the dehumidifier and turn the ON/OFF switch ON.
2. Rotate the control knob to TEST.
3. The blower will turn on after a few seconds and the green Status light will flash. Three minutes after the blower turns on, the
compressor will start and the Status light will be on continuously –allow the compressor to run for a few minutes.
4. Adjust the control to the desired setting.
TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
Blower does not turn on and Status
LED does not flash
No power at outlet
Check the fuse/circuit breaker serving the outlet into which the
dehumidifier is plugged
Control not in Test mode
Rotate the knob to OFF then back to Test mode –rotate until you
hit the stop
Control is not powered
Check the ribbon cable connection at the power board and
control board. Remove the Control Knob and the screw securing
the Control Door to view the ribbon cable connection on the
control board
LED flashes but blower does not turn
on.
Blower wire(s) not
connected on power board
Check that the yellow and blue wires are connected to the
terminals labeled “NTRL. YEL.” and “FAN BLU.” terminals on
the power board
Compressor does not start and Status
LED continues to flash
Three minute sampling
period has not expired
Wait for three (3) minutes after the blower has started
Compressor does not start and Status
LED is lit continuously
Compressor wire(s) not
connected on power board
Check that the orange and brown wires are connected to the
terminals labeled “NTRL. ORG.” and “COMPR, BRN.”
terminals on the power board.
Black leads not connected
on daughter board
Ensure that both leads are securely connected to the terminals on
the daughter board.
Compressor does not turn off when
control is adjusted out of TEST and
Status LED remains on
Compressor stays on for a
6-minute minimum on time
Wait for 6 minutes.
PO Box 1467 Madison, W1 53701-1467 Phone [phone] Fax [phone] www.aprilairepartners.com
10009180
B2205278A
© 2010 Research Products Corporation