Operator`s manual

50 100 Operator’s Manual
5 Troubleshooting and Maintenance
Operation is noisy. Air is trapped in the tank or lines. Attempt to prime the system by raising and
lowering the front and rear of the instrument.
The pump or motor is faulty. Inspect the electrical connection from the
pump / motor to the main PCB for damage or
excessive wear. Replace the pump if
necessary. Contact the Dissolution Systems
Service Department for assistance.
Plumbing connections are in the
wrong configuration.
Ensure the lower bulkhead fitting tube on the
water bath is connected to the pump inlet.
The water circulates but does not
heat.
The temperature setting is
incorrect.
Ensure that the correct set temperature has
been input.
The heater relay is defective. Contact the Agilent Service Department for
assistance. See “Obtaining Warranty and
Other Services” on page 51.
The heater elements are degraded
or faulty.
For 115 V, the resistance is between 10 and 15
ohms. For 230 V, the resistance is between 48
and 52 ohms.
Contact the Agilent Service Department for
assistance. See “Obtaining Warranty and
Other Services” on page 51
The main PCB is faulty. Contact the Agilent Service Department for
assistance. See “Obtaining Warranty and
Other Services” on page 51
The temperature is not stable or is
incorrect.
The thermistor is faulty. Exchange the water bath temperature probe
with a known good probe if one is available.
If one is not available, see “Water Bath
Temperature Probe Accuracy Test” on
page 41.
Instrument requires calibration. Contact the Agilent Service Department for
assistance. See “Obtaining Warranty and
Other Services” on page 51
Table 4 Troubleshooting
Symptom Probable Cause Possible Solution