elements (see para. 228). Also notify unit maintenance to troubleshoot the HIGH PRESSURE RELIEF VALVE
and the HIGH PRESSURE SWITCH:
power to the ROWPU.
blue lamp, R.O. PUMP
LOW PRESSURE, on ROWPU control box
assembly comes on as soon as power is applied to the ROWPU.
Push EMERGENCY STOP button in if any of the following conditions exist:
Operating personnel could be injured or the equipment could be damaged if
operation of the ROWPU is allowed to continue.
(1) Blue HIGH PRESSURE lamp associated with R.O. PUMP comes on but R.O. Pump does
not automatically stop.
(2) Blue LOW PRESSURE lamp associated with R.O. PUMP comes on but R.O. Pump does not
(3) Some other serious trouble (malfunction) indicated by noise, vibration, large water leaks,
Figure 2-45. Emergency Stop Button