Hypertherm HT200LHF-200 Volt HySpeed - Manual (Page 105)

MAINTENANCE
5-16 HySpeed HT2000LHF
Instruction Manual
6
Check Pump, Motor and Solenoid Valve (V1)
1. If the coolant is not flowing, check to see if the motor and valve V1 are getting 240VAC. Note: The 240VAC
relay (CR3) on PCB1 will not close until the first 5 interlocks (STATUS) indicators are satisfied. (See
Start
Sequence
flowchart earlier in this section.)
2. If the motor, pump and valve all seem to be functioning and the flow is not sufficient, replace the pump and
motor assembly.
5. Turn the power supply power on.
6. Hold down the ON (I) button on the power supply.
7. Start timing for 30 seconds, and then release the button.
8. Verify that the container is 1/2 full. If not 1/2 full, repeat this test and time discharge for 1 minute. After 1 minute
verify that the container is at least 3/4 full.
8.1. If the 1-gallon container is less than 3/4 full after step 8, go to
Verify Flow Rate to Torch.
8.2. If the 1-gallon container is at least 3/4 full after step 8, the problem is either with the flow switch or the
particulate filter.
• Remove the filter element and re-connect the coolant hose to the cathode block on the rear of the power
supply.
• Start the power supply. If the COOLANT FLOW LED remains illuminated, replace the flow switch. If the LED
does not illuminate, replace the filter element.
Verify Flow Rate to Torch
1. Press the power supply OFF (0) button and place the main disconnect switch to the OFF position.
2. Remove the torch consumables.
3. Replace only the retaining cap on the torch. (Do not replace the electrode, nozzle and swirl ring back in the
torch.)
4. Place the empty 1-gallon container under the torch.
5. Turn the power back on and press and hold down the power supply ON (I) button.
6. Start timing for 1 minute. The torch should deliver at least 1 gallon (3.8 liters) of fluid in 1 minute.
7. If the torch delivers at least 1 gallon (3.8 liters) of fluid per minute, then the flow rate to the torch is OK. Replace
the torch. If the torch does not deliver at least 1 gallon (3.8 liters) of fluid per minute, go to
Check Pump, Motor,
and Solenoid Valve (V1).
8. If replacing the torch does not satisfy the flow switch, then replace the torch leads.