Hypertherm Koolant Koolers N-Series, User Manual, Page: 47 / 77

Troubleshooting ‐ Alarm List
45
Alarm
Code
Alarm Name Type Description Corrective Action

Verify the chiller is operating within the specified
environment conditions (refer to Section 5.2.1).

Verify that air intake and exhaust clearances have
been adhered to (refer to Section 5.2.5).

Verify the compressor status is “ON” (refer to
Figure 21).

Verify the motorized hot gas valve is fully closed
(0%) (refer to Figure 21).

Verify the Superheat is < 20°F (refer to Figure 15).
If the Superheat is > 20°F the refrigerant charge
may be low.

Contact DTS Service.
AL*024
Fluid Under Temp
Fault
Auto
reset
Process water outlet temperature
is < 10°F (5.6°C) below its setpoint.

Verify the tank heater status is “ON” (refer to
Figure 24).

Verify the compressor status is “OFF” (refer to
Figure 21).

Contact DTS Service
AL*025 Tank Level Low
Auto
reset
The coolant reservoir level is low,
but pumps are operable.
Refill the coolant reservoir (refer to Section 6.9).
AL*026 Tank Critically Low
Auto
reset
The coolant reservoir level is too
low to safely operate the pumps.
Refill the coolant reservoir (refer to Section 6.9).
AL*027 Low Pressure Fault
Auto
reset
The refrigeration circuit suction
pressure has gone too low.

Verify the chiller is operating within the specified
environment conditions (refer to Section 5.2.1).

Verify the Superheat is < 20°F (refer to Figure 15).
If the Superheat is > 20°F the refrigerant charge
may be low.

Contact DTS Service.
AL*028 Process Flow Fault
User
reset
The process coolant flow rate is
below the minimum threshold 0f
0.4GPM

Verify that all valves in the process fluid circuit
are open.

Verify that there are no kinks or other
obstructions in the process fluid hoses.

Verify that the fluid reservoir is not low.

Check the Process circuit fluid filter to ensure the
filter is clean. If the filter is contaminated replace
the filter (refer to Section 10.2).

Reset the alarms (refer to Section 8.2.3) and
restart the chiller.

If the fault persists contact DTS Service.
AL*029 Recirc Flow Fault
User
reset
The flow rate in the recirculation
circuit is below the minimum
threshold of 6GPM.

Check the Process circuit fluid filter to ensure the
filter is clean. If the filter is contaminated replace
the filter (refer to Section 10.2).

Fully open the globe valve at the outlet of the
recirculation pump. Reset the alarms (refer to
Section 8.2.3) and restart the chiller. If the chiller
starts adjust the globe valve until the
recirculation flow rate reaches the flow specified
in Table 1.

If the fault persists contact DTS Service.
AL*030
Process Fluid Press
Hi
User
reset
The process outlet pressure has
exceeded its maximum threshold
of 240PSI.

There is likely a problem with the pressure relief
bypass valve. Contact DTS Service.
AL*031
Temp Limit
Shutdown
Auto
reset
Outlet fluid temperature has
exceeded 130°F.

Verify that the plasma cutter heat load does not
exceed the specifications defined in Table 1.
Hypertherm, Inc. Part Number: 810540