Firing Interrupted By Pf Or Errp - Paragon DTC 1000 Operation & Maintenance Instructions Manual

When a relay chatters or buzzes instead of clicks, the
problem may be a weak transformer. A chattering relay
can cause erratic temperature readings.
How to Test a Relay: You will need an ohmmeter, 12 volt
battery and 2 clip wires. (Or you could test the relays by per-
forming the Element Glow Test, page 15.)
WARNING: You must disconnect the controller
board-to-relay wires to test the relay(s) with a battery.
Leaving the wires connected could damage the controller
board.
1 UNPLUG kiln and remove switch box. Find the two
wires going from the controller board to the relay you
are testing. Disconnect these wires from the relay.
Then connect a 12 volt lantern battery to the same relay
terminals (#5 and #6 on diagrams below) using clip
wires. You should hear a clicking noise when you make
the connection. If there is no click, the relay may be de-
Sometimes a replacement relay will be of a different brand than the relay in
your kiln. If so, transfer the wires from the old relay to the new one by the num-
bers on this chart. Ignore the terminal numbers printed on the relay bodies
when using this chart.
Wiring for Omron & Arowmat Relays
1
2
3
4
1
2
3
4
5
6
Wiring for P & B Relay
5
6
fective. Make sure your battery is good before assum-
ing the relay is bad.
2 Touch ohmmeter lead wires to relay terminals marked
#1 and #2 in the diagram. With the battery still con-
nected, you should get a continuity reading (0 ohms)
on the ohmmeter. If you get a no-needle movement
when the battery is connected, replace the relay. Place
the ohmmeter wires on relay terminals marked 3 and 4
on the diagram and test the same way.

Firing Interrupted by PF or ErrP

Problem:
Probable Causes:
Temporary Power Failure
Low Voltage at Wall Receptacle
Corroded Cord Plug or Wall Receptacle
Defective Transformer
Disconnected or Loose Wire
Electrical Noise
alternates with the temperature display during
PF
firing: this means the power went off for a moment during fir-
ing. Then firing resumed. To go back to a normal temperature
display, press ENTER .
Steady , no temperature display: this means a fir-
ErrP
ing has been interrupted by a longer power failure.
For a more detailed explanation of power failure mes-
sages, see page 13.
Low voltage can also cause the kiln to shut off and display
either or a blank display. If this happens and you did not
PF
have a power failure, have the power company or an electrician
check the wall receptacle, while the kiln fires, for low voltage.
Sometimes there is just enough voltage to program the board.
But when the relays turn on, the voltage from the transformer
drops below the minimum operating level, and the display
goes blank.
ErrP displays even though power did not fail: If the
voltage at the wall receptacle is okay, UNPLUG kiln, remove
switch box, and look for a wire that has become disconnected
from a relay. If a wire comes loose from a relay and touches
anything grounded in the switch box, the board will read
when you start the program. Electrical noise can also
ErrP
cause an display.
ErrP
A corroded kiln cord plug or wall receptacle can cause a
or blank display. Pull the plug from the wall. Clean the prongs
on the plug with fine emery paper or a pencil eraser until the
prongs are bright. If the plug or wall receptacle is blackened,
replace. A loose wall receptacle screw or loose circuit breaker
screw can also cause a power failure display.
Check transformer if the wall receptacle voltage and switch
box wiring are okay. (See "Controller Display Does Not Light
Up," page 16, and "Kiln Switch Box Fuse Blows Repeatedly,"
page 20.)
PF
17