30
3.13 Troubleshooting.
Problem
Cause
Corrective
Action
Large over shoot of the set point
(> 3o) during initial warm-up or
unstable temperature control.
Output power level is set too high.
(Make sure you’ve set the power
level for the channel actually being
used).
Set the output power level to a lower setting (see Section 3.6).
Controller is not tuned for process
being heated.
(Make sure you’ve set the power
level for the channel actually being
used).
Tune the controller as outlined in Section 2.
The process heats too slowly.
Output power level is set too low.
Increase the output power level to the next higher setting (Section
3.6).
The heater doesn’t have enough
power.
Replace with a more powerful heater. For assistance contact
J-KEM.
The controller does not come on.
15 amp fuse on back has blown.
Replace the fuse on the back of the controller with a new 15 amp
fuse.
Internal 2 amp fuse has blown.
Not user serviceable. Have qualified electrician replace.
Circuit breaker on back has tripped.
Allow to cool, then reset circuit breaker.
The controller comes on, but
does not heat.
The timer controls are set incorrectly.
Change the position of switch 18 or enter a time into the timer. See
Section 3.5.
The heater is broken.
To verify that the controller is functioning properly, place the power
level switch on the >2L setting and enter a set point of 100o C. Plug
a light into the outlet of the controller, then wait 1 minute. If the
light comes on the controller is working properly.
Controller blinks:
“
inPt
” “
FAiL
”
The temperature sensor is unplugged,
excessively corroded or broken.
Clean or replace broken sensor.
“
-AL-
”
The process temperature is hotter
than the alarm temperature.
Correct the over temperature condition.
If audible alarm is sounding press the power level button for the
channel who’s power level LED is blinking.
To permanently disconnect alarm see Section 3.6.
“
PArk
”
Controller has been placed in “Park”
mode.
1. Hold in both the ▲ and
▼
keys on the front of the J-KEM
temperature meter until ”
tunE
” appears in the display.
2. First hold in the “*” key, then while holding in the “*” key press the
▼ key until “
oFF
” appears.
3. Hold in the ▲ and
▼
keys until the temperature appears in the
display.
“
tunE
” “
FAiL
”
Autotune routine failed.
Turn off controller for 10 seconds. See Section 2.2.
