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TROUBLESHOOTING
SITUATION
CAUSE
TROUBLESHOOTING
1.LED is off when power
a.
a.
on
b. Power plug is loose
b. Plug in firmly or replace the socket
c.
c.
NO power input
Abnormal voltage input
2.After temperature
a.
Check power supply and stop using
temporarily
d. Fuse blowout
e.
Check power supply system
Power cord disconnection or bad
d. Check power voltage and reset
connection
e.
Replace switch
f.
Replace power cord
a.
Waiting for temperature dropping
Chamber(bath)inside actual
setting,Heating
temperature is higher than setting
LED=(OUT1) is off
temperature
or cooling
b. Replace
b. PT platinum breakdown
c.
Ask for repair
a.
Ask for repair
c.
Thermometer output signal…nil
3.Heating LED is on but
a.
Heater disconnection
temperature can not rise
b. Bad heater circuit
b. Ask for repair
c.
c.
Bad control circuit
d. High temperature protection-setting,
e.
d. Reset
e.
locking
Ask for repair
Water supply
Water level of floating ball is too
low(water bath)
4.Temperature keep rising
a. Temperature is out of control
a. Ask for repair
and out of control
b. Heater circuit is out of control
b. Ask for repair
c. P.I.D.value is not correct
c. Re-calculating automatically
d. S.S.R. breakdown
d. Ask for repair
5.temperature tolerance is
a.
a.
large
b. P.T.D.value is not set
c.
Temperature is unstable
or not correct
Temperature setting is too close to
minute
b. Re-calculating AT automatically
c.
Add cooling system or dropping
ambient temperature
room temperature
13
Suspend for 30
d. circulating fan or motor cannot work
d. Ask for repair
e.
PT platinum bad connection
e.
Ask for repair
f.
Air circulation inside is blocked
f.
Improve articles placement