Barnstead International Thermolyne 859 Series, Service Manual

Page: 64 / 118

64
E
RRORS
Solution (cont.)
Solenoid valve is bad and not engaging the
plunger. Turn unit on and start cycle to listen for
the solenoid valve to active. Watch for move-
ment in the plunger.
To remove the door solenoid:
1. Disconnect the power to the unit and
drop down the front control panel.
2. Remove the two wires on solenoid
valve and two screws on the outside of
the case.
Microswitch on right side of the unit has failed.
This switch looks for the plunger to engage.
12VDC pulse engages the solenoid valve.
Door switch on left side of unit - make sure it is
connected.
Main Logic Board has failed (Moss FET on
board has failed.)
Turn the unit off and power back up. If E003
comes up then proceed with E003 information
above.
If E003 does not come up then replace the Logic
PC Board or the Main PC Board.
Reset the time and the date.
Recalibrate the balance.
Check the balance connection.
Replace balance and/or cable WH859X3A. If the
balance needs to be replaced, see BALANCE
section of this manual.
No display on balance display – OHAUS bal-
ance - check the fuse on the balance.
Cause (cont.)
Analog to Digital Convert is not func-
tioning properly. A component failure
or faulty cable connection may cause
this. This should only occur during a
test.
The DTR signal from the balance is
indicating the balance is either not
ready or not connected.
Error Code (cont.)
E005 (cont.)
E007
E008