21
2009 AT8 M anual
• Press and hold the DOWN arrow to manually feed pH
for the programmed feed time. The word “pH” flashes
during feed of pH.
• Press and hold the UP arrow to manually feed
sanitizer for the programmed feed time.
The word “ORP” flashes during feed of sanitizer.
5.1.7 manual Feed
The display backlight is dimmed during normal operation to conserve life. It never goes
out completely to allow for viewing in normally dark environments, such as, pump
rooms. When any key is pressed it will brighten for a few minutes.
5.1.8 display backlight
• An “X” is displayed under the “F” on the right side when there is flow.
NOTE: if there is no “X” (no flow) then the feed relays are locked out.
5.1.5
Flow
• If the pH reading has an asterisk “*” in front of it, then pH is in safety lockout mode.
See pH FEEd SAFETY section for information.
• If the ORP reading has an asterisk “*” in front of it, then ORP is in safety lockout mode.
See ORP FEEd SAFETY section for information.
5.1.6
Indication of Safety lockout
1
pH
ORP
TMP
F
A
7.0
750
78
X
1
pH*
ORP
TMP F
A
7.0
750
78 X
1
pH
ORP*
TMP F
A
7.0
750
78 X
T
C
E
L
E
S
U
N
E
M
D
L
O
H
R
O
F
D
E
E
F
L
C
D
L
O
H
R
O
F
D
E
E
F
H
p
