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Thermo Scientific
Troubleshooting
Chapter 5
This chapter covers the basic troubleshooting procedures.
1. Chiller will not start or shuts down
a. Check the line cord; ensure it is plugged in.
b. Check the position of the circuit protector on the rear of the chiller.
c. Check the controller for error codes, see Chapter 4.
NOTE On chillers with a Low Flow Switch, and that are configured
to shut down with a low flow fault (
may be necessary.
d. On chillers with a Reservoir Level Switch, check the reservoir level.
e. On chillers with optional serial communications or remote start/
stop, ensure the desired mode is enabled.
f. Make sure power source voltage is within the chiller rated voltage
±10%.
g. If
is lit, the chiller was shut off using serial
communications. Start the chiller using serial communications. To
start the chiller using the local controller press and hold both
arrow keys for 10 seconds, the controller will power. Turn serial
communications off using the procedure in Chapter 2, and then
press
to turn off the controller. Press
chiller.
), several starting attempts
again to start the
Merlin
5 -1
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