Troubleshooting:
PROBLEM: Days are flashing, pressing any key does noth-
ing except key turns output On and OFF.
SOLUTION:
Time of Day
and
Day of Week
have not been
set. See
“Setting the Time”
.
A second, but very unlikely cause of loss of program, is a
power failure with the backup capacitor low or dead. Check
by disconnecting power and monitoring how long the
capacitor keeps the time of day in the display. Typically, the
capacitor will maintain the time and programs for 4 days,
but not more than 5 days.
PROBLEM: Time of day was set while holding the key
down, but days are still flashing.
SOLUTION: Current day of week was not set
while holding
down the key
. See
“Setting the Time”
.
PROBLEM: It is 10 AM and an ON program for 8 AM was
entered, but the output is not ON. Display shows the
and symbols.
SOLUTION: After programming, the timer does not “look
back” to determine if it should be ON. Press the key
(temporary override) to turn the output ON; appears
in display. The timer will assume automatic operation at the
next programmed event.
PROBLEM: A program for 8 AM Monday thru Friday was
entered, but it will not accept it and is flashing.
SOLUTION: The ON or OFF was not entered as part
of the program. On or OFF
must be selected
.
D
O IT
O
NCE
. D
O IT
R
IGHT
.
™
TACO, INC.
, 1160 Cranston Street, Cranston, RI 02920
Telephone: (401) 942-8000
FAX: (401) 942-2360.
TACO (Canada), Ltd.
, 6180 Ordan Drive, Mississauga, Ontario L5T 2B3.
Telephone: 905/564-9422.
FAX: 905/564-9436.
Visit our web site at:
http://www.taco-hvac.com
Printed in USA
Copyright 2003
TACO, Inc.
Program ON/OFF
h
m
Day(s)
1
On
7 AM
00
Mon., Tue., Wed., Thurs., Fri.
2
Off
8 AM
00
Mon., Tue., Wed., Thurs., Fri.
3
On
8 AM
00
Saturday and Sunday
4
Off
9 AM
00
Saturday and Sunday
PNP Digital Timer Program Schedules (Example)
TIMER
BLACK
WHITE
YELLOW
NEUT. WHITE
YELLOW MOTOR LEAD
WHITE MOTOR LEAD
GND
SCREW
PUMP
LINE BLACK
WHITE
BLACK
AQUASTAT
5 4 3 2 1
TIMER
BLACK
WHITE
YELLOW
NEUT. WHITE
YELLOW MOTOR LEAD
WHITE MOTOR LEAD
GND
SCREW
PUMP
LINE BLACK
5 4 3 2 1
BLACK
WHITE
NEUT. WHITE MOTOR LEAD
YELLOW MOTOR LEAD
GND
SCREW
PUMP
LINE BLACK
AQUASTAT
THREADED PIPE
LOCKNUT
SPACER
RING
PUMP TERMINAL BOX
PUMP
TIMER MODULE BACK
Timer and Aquastat Wiring Diagram
Timer Only Wiring Diagram
Aquastat Only Wiring Diagram
Timer Installation Diagram
(006 Circulator Shown)
