Instruction manual

K1, K3 series chillers – Installation and Operation manual

Issue 7.0 Page 10

CAL controller error messages

Message displayed Cause and correction

InPt – FAiL

Sensor has failed.

Order replacement part number EA-038

Data – FAiL

Controller problem.

Switch off, then on.

If problem is persistent, order replacement

part EA-055

- AL - (At start up)

Ambient temperature outside of permitted

range, 5°C - 40°C

- AL - (After changing setpoint)

Restart the controller to reset the alarm

- AL - (During normal operation)

Fault on system.

Refer to Troubleshooting, section 4.1

Fluid flow and pressure

K series chillers contain a high pressure volumetric pump capable of 150 psi. All units are

supplied with a pre-set maximum of 50 psi. Pressures above this will cause the internal

safety bypass valve to open, protecting your application from potentially dangerous

pressures.

It is possible for customers to change the operating pressure of the chiller, as follows:

1. Remove the cover from the chiller, giving access to the top compartment, figure 1.

2. With the chiller running, release the locking nut on the pressure relief valve.

3. Turn the valve knob anticlockwise to reduce the flow/pressure, clockwise to

increase the flow/pressure.

4. The pressure can be observed on the gauge on the front panel.

Caution:

Changing the flow/pressure with the pressure relief valve will also change the preset

pressure safety setpoint. This will move to a lower pressure than the factory setting when

decreasing the flow/pressure, and to a higher pressure when increasing the flow/pressure.