R Series
30934 V2
Operating Manual
Page 18
www.grantinstruments.com
10.0 Optional accessories
10.1
Alternative pump
A pump comes as standard on Optima models TC120, TX150 and TXF200. If greater
head (pressure) is required you can choose from two accessory pumps and the
appropriate pump lid. Add L to pump part numbers for 120V (60Hz) versions. See the
Grant website at www.grantinstruments.com for full technical specifications.
Pump Product Description
VTP1
Max head pressure: 1000mBar
Max flow rate: 9 L/min
VTP2
Max head pressure: 1700mBar
Max flow rate 12 L/min
17927
Pump lid for LTC2
A full listing of product accessories and options is available in the Grant Scientific
Reference Catalogue (a copy of which is available upon request) and on the Grant
website at www.grantinstruments.com.
11.0 Troubleshooting
Symptom
Possible cause
Action required
Unit fails to cool Compressor
overheated causing
internal over-
temperature
thermostat to operate
Wait for compressor to cool, when thermostat
will reset and compressor will switch on again.
Unit failing to
cool below 5°C
Freezing protection
switch is on and is
preventing further
cooling
Switch off freezing protection (see section
5.2.3).
Unit not cooling
at higher
temperatures
Over temperature
protection switch has
tripped
Refrigeration unit may have temperatures in
excess of 100°C. Leave the unit to cool and
reset (see section 5.2.3)
Cooling
performance
reduced
Condenser fins
clogged
Carry out routine cleaning (see section 9.1)
For any other errors or service requests, please contact Grant Instruments service
department.