93
DRISTEEM HIGH-PRESSURE SYSTEM INSTALLATION, OPERATION, AND MAINTENANCE MANUAL
High-pressure system troubleshooting
Table 93-1:
Troubleshooting (continued)
Issue Action
The system does not start manually or
automatically.
Check supply voltage.
Check circuit breakers.
Check interlock switch.
Verify that the low-pressure manual water supply valve is in the Open position.
Verify that the water pressure is at least 25 psi (170 kPa).
Verify that the cartridge filter is clean.
Check for alarms.
Check the control and power fuses located inside the control and power panel.
Check the transformer voltage.
Verify that actual relative humidity is lower than desired relative humidity.
Verify that the device sending the humidity demand signal is operating.
Verify that the humidity detection instrument is calibrated correctly.
Verify that the Pump Enable switch is in the On position.
The system is operating but provides
only low pressure or no pressure.
The pressure gauge on the pump should match the pressure set point. If needed, adjust the operating
pressure with the unloader valve. See “Confirming unloader valve pressure setting” on Page 65.
Check if there are any leaks in the high-pressure lines. Repair if needed.
Verify that the depressurization valve is turned off.
Verify that the low-pressure water supply is in the On position.
Verify that the low-pressure water supply is at least 25 psi (170 kPa).
Verify that the filter cartridge is clean.
Verify that the that the RO flush valve is not open.
Verify that the high-pressure lines are adequately drained with no air in the lines. See “Flush dispersion
piping and manifolds” on Page 54.
Verify that the high-pressure supply ball valves are open.
VFD fault
Make sure that there is adequate ventilation around the motor to keep it from overheating.
Verify that the motor fan is operating and unobstructed.
Verify that the voltage and amperage of the motor electrical supply is adequate and follows the
specifications written on the motor.
Verify that the pressure gauge located on the pump matches the pressure set point. If needed, adjust
the operating pressure with the unloader valve. See “Confirming unloader valve pressure setting”
on Page 65.
Verify that the humidifying nozzles or line filters are not sealed off.
Verify that the high-pressure staging valves are not blocked and are in the On position.
Verify that the high-pressure zone manual valve is in the On position.
The following troubleshooting instructions are specific to the DriSteem High-Pressure System. For additional information,
including messages and alarms, see the Vapor-logic Control System High-Pressure System Addendum.
TROUBLESHOOTING
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