Troubleshooting - Ralston Instruments QTHP Operation Manual

Troubleshooting

Dépannage ......................................27
Diagnóstico de problemas ...............28
故障排除 ..........................................29
Устранение неполадок ..................30
The pump will not build pressure.
EN
If the pump will not build pressure, then prime the pump. Follow the
instructions on page 14.
The pump will not prime.
If the pump will not prime, then follow the instructions below:
1. Remove the inlet check valve plug (QTHP) or the primer
assembly (XTHP).
2. Inspect the inlet check valve O-ring for debris or damage. Clean/replace/
lubricate as needed.
3. Pour some fluid in the inlet port from which the plug or primer
was removed.
4. Reassemble.
The pressure drops off up to 10% after it is pumped up.
If the pressure drops off up to 10% after it is pumped up, then follow the
instructions below:
1. Wait 3–5 minutes for the pressure to stabilize. The liquid heats as it is
compressed and cools slowly. As the liquid cools the pressure drops
until the liquid reaches room temperature.
2. Take your pressure reading.
3. If waiting for the pressure to stabilize does not solve the problem,
then close the Bleed Valve tighter.
4. If it still leaks, then check the fine adjust piston, outlet hose adapter, the
outlet check valve plug or the bleed-off valve for signs of leakage.
a. Remove the leaking part.
b. Clean, lubricate and replace the leaking O-ring.
c. Reassemble.
The pressure goes up when the handle is squeezed, and
the pressure drops when the handle is released.
If the pressure goes up when the handle is squeezed, and the pressure
drops when the handle is released, then follow the instructions below:
1. Close the bleed valve tighter.
2. If tightening the bleed valve does not solve the problem, then remove
the reservoir.
3. Remove the gauge port and outlet check valve.
26
Solução de problemas .....................32
Diagnostica ......................................33
Fehlerbehebung ..............................34