- 39 -
Troubleshooting
Checklist
Unit will not start
Check the line cord; ensure it is plugged in.
Check the position of the circuit breaker on the rear of the unit.
Check reservoir. Unit will not start if fluid level is below the lower horizontal slit.
On Digital Plus controllers, check Serial Communication Mode on or off.
Check the controller for error codes, see previous page.
Make sure the voltage of the power source meets the specified voltage,
±10%. Refer to the serial number label on the rear of the unit to identify the
specific electrical requirements of your unit.
Loss of cooling capacity
Be sure the cooling capacity of the unit has not been exceeded if circulating to
an external system.
Proper ventilation is required for heat removal. Ensure ventilation through the
front and rear panels is not impeded and the panels are free of dust and debris.
Ice build up on the cooling coils can act as insulation and lower the cooling
capacity. Raise the temperature of the bath to de-ice the cooling coil and
increase the concentration of non-freezing fluid.
RTE 7 "clicking"
Turn the unit off to initiate the 30 second refrigeration pressure equalization off
delay. Turn the unit back on to initiate the 30 second refrigeration pressure
equalization on delay.
The RTE 7 is not designed to be used beyond the voltage range or have
momentary power interruptions. Install an un-interruptible power supply or a
line loss detection method.
Unit not cooling above 50°C
The unit is not in the Full Range Cooling Mode. See Setup Loop on page 21.
No external circulation
Check for obstructions, kinks, or leaks in the circulation tubing.
Circulation will cease when the pump head has been exceeded.
Continued on next page.
