OHAUS CKW-55, Service Manual

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2-6
CHAPTER 2 DIAGNOSIS
SYMPTOM
Err 1
Err 2
Err 3 (LFT mode only)
Err 7
Err 10
Err 14
Err 21
PROBABLE CAUSE
Overload condition, the load
on the Platform exceeds the
rated capacity of the base
used with the Indicator
Underload condition.
Power on zero e10%
of original calibration zero.
EEPROM data incorrect on
Main PC board.
Library or Real Time Clock
(RTC) data incorrect.
Zero value exceeds the % zero
setting value.
Calibration incorrect.
REMEDY
Remove excess load. Turn Indicator off
then on. Perform calibration. Refer to
section 3.11 when using a base or
section 3.14 when using a simulator.
Replace platform if removed, cycle power
off then on, see section 3.11 or 3.14 and
calibrate the Indicator.
Clear platform of excess mass, or
recalibrate to establish a new zero point.
Go through all menus and re-establish
all settings or go to each menu and reset
to default settings. Check operation of
Indicator , see section 3.9. If this fails,
the Main PC board is defective. Refer to
section 4.3 and replace the Main PC
board. Check operation of Indicator , see
section 3.9.
Replace RTC (Lithium) back-up battery.
Refer to section 4.9 and replace the
battery.
Remove excess load from the base or
platform. Select a higher Zero Range
value, (Non-LFT only.) in the Setup menu.
Perform calibration using proper masses.
Perform Operational Tests, see section
3.8.
2.4 ERROR CODE TABLE
The CKW-55 Indicator is equipped with software which will display an error code under certain conditions.
Review the listed codes and follow instructions to correct the problem.
TABLE 2-10. ERROR CODES