Operating instructions

62
Operation
Operation:
Troubleshooting guide
Troubleshooting guide.
Problem
number
Problem Possible cause Action
26
Unit does not fill with
water (cont.).
 Unit is not in auto
mode.
 VAPOR-LOGIC
®
3
control is in end of
season drain mode.
 Malfunctioning level
control system
 Inlet water needle
valve is closed.
 Go to Control Modes screen and select
Auto Mode.
 Check for humidity demand
(VAPOR-LOGIC
3
control board
terminals 21, 22 and 23 of terminal
block J26).
 Disconnect brown and orange wires
connected to VAPOR-LOGIC
3
board
terminals 30 and 31 of terminal block
J8. If fill valve does not open, check
for proper 24 VAC (terminals 1 and 2)
to fill valve coil. If proper voltage is
not present, the control board is
defective.
 Check terminals 30, 31, 32 and 33 on
VAPOR-LOGIC
3
control board
terminal block J8 for correct voltage:
 32 (purple) to 33 (yellow),
no water present > 2 VAC
 32 (purple) to 33 (yellow),
water present < 1/4 VAC
 31 (orange) to 33 (yellow),
same readings as above
 30 (brown) to 33 (yellow),
same readings as above
 Check needle valve.
More on next page ...