Hitachi CHROMASTER 5160 Instruction Manual page 697

4.4 Troubleshooting
Symptom
No.
(Error message)
12 OVER MAX
TEMPERATURE LIMIT
PRESS "CL" KEY,
THEN CHECK MAX
LIMIT
13 LED does not light up
14 Temperature does not
displayed
15 Temperature does not
rise (or fall)
16 READY status not
attained
17 Takes much time to
attain READY status
18 Gas leak error not
issued although liquid
leak has occurred
19 Large deviation in
temperature setting
accuracy
20 Nothing indicated on UI
pad
21 Keying on UI pad not
accepted
Cause
1. Upper temperature limit
is too low (The upper
limit of temperature is
set at a level lower than
ambient temperature.)
2. Temperature sensor
abnormal
3. Circuit board faulty
1. 100 V AC not obtained
from power outlet
2. Main unit power cord is
not inserted in power
outlet
3. Main power switch on
side face of column oven
unit is not turned on
4. Blown fuse at rear of
main unit
Inside cover is open
1. Inside cover is open
2. Error has occurred
3. Error isn't reset.
(after occurrence of
temp. upper limit error)
1. Front door is open
2. Error has occurred
1. TOLERANCE setting is
too low
2. WAIT TIME setting is
too long
1. Alarm level of gas leak
sensor is too high
2. Gas leak sensor faulty
1. External temperature
sensor (calibrated one)
not installed correctly
2. Temperature calibration
not set correctly
Incomplete connection of
UI pad
1. Keylock status has
been set
2. Chromato data station
(CDS) or GUI controller
is connected.
4 - 12
Remedy
1. Set upper temperature limit
properly.
2. If error recurs after power is
restored, contact your nearest
service office of Hitachi High-
Technologies Corporation sales
representative.
NOTE:
Pressing the CL key can clear this
error indication. Temperature
control, however, remains off until
making temperature setting and
upper limit setting again.
1. Turn power ON.
2. Insert the power cord.
3. Turn on the main power switch.
4. Replace the fuse.
Close the inside cover.
1. Close the inside cover.
2. Eliminate cause of error, then
reset error.
3. Reset temperature and upper
limiter.
1. Close the front door.
2. Eliminate cause of error, then
reset error.
1. Increase the TOLERANCE
setting.
2. Set a shorter WAIT TIME.
1. Adjust alarm level of gas leak
sensor.
2. Inject 50 μL of methanol into
oven, and if gas leak sensor
output doesn't change, contact
your nearest service office of
Hitachi High-Technologies
Corporation sales
representative.
1. Install the sensor correctly.
2. Reset the temperature
calibration.
Correct the connection of UI pad.
1. Release the keylock (with ESC
key).
2. Disconnect chromato data
station (CDS)/GUI controller.
(cont'd)