Esco Ascent max, User And Service Manual

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30
Connection
problem to relay
board
•
See Component Layout to locate the relay board.
•
Measure the incoming voltage on the Relay Board at terminal J 1 (Note polarity,
BLUE cable closest to edge is negative ‐ ). See Figure 1 ‐ 8.
•
Voltage should be between 6.75 – 8.25VDC.
•
If voltage is out of range, check connection between SMPS and relay board.
•
If voltage is correct, proceed to next step.
Defective relay
board
•
Ensure the following are correct:
o
Main board is operational
o
Flat Ribbon cable is installed correctly to relay board and main board and shows
no physical damage
o
Relay board has the correct incoming voltage (6.75 – 8.25VDC)
o
Check all fuses on relay board: Turn off power, remove fuses and physically
inspect or check continuity
o
All wiring connections are good
•
Turn the cabinet on. If the FAN, LIGHT, SOCKET and cannot be controlled, replace
the Relay Board.
NOTE: When replacing relay board, please re ‐ connect all the cables back correctly. Any wrong
wiring may result in damage.
Problem 2: Blower doesn’t function
Cause Corrective Action
Fan is Off
•
Switch on the Fan by pressing Fan button on control panel.
•
Enter the Fan PIN number if required (default is 0001)
•
The LED for FAN should illuminate and the FAN should start.
•
If the FAN does not operate, proceed to next step.
•
If the LED on the membrane does not illuminate, check connection from control
panel to main board and LCD, keypad membrane.
Figure 1 ‐ 8
Figure 1 ‐ 9