Table 3-1. Direct Support Troubleshooting - continued
TEST OR INSPECTION
REVERSE OSMOSIS (R.O.) PUMP ASSEMBLY - continued
UNABLE TO JOG R.O. PUMP.
High voltages in this equipment can cause serious injury or death. When applying power during a
test, take proper measures to ensure personal safety. Never work on electrical equipment unless
there is another person nearby who is familiar with the operation and hazards of the equipment
and who is competent in administering first aid.
Check if circuit breaker, CB1 and/or heater assembly are tripped.
If either one or both are tripped, go to Malfunction 2, Reverse Osmosis Pump Assembly
Check if other pumps operate.
If other pumps do not operate, go to Malfunction 1, ROWPU Assembly.
Check if relay, K1 comes ON when jog switch is held to ON position.
If relay does not come on when jog switch is held to ON, go to step 7.
Check if 208 VAC, three phase power is available at pump jack, J6 (back of junction box) when jog
switch is held to ON position.
If power is available in all three tests (A-B, A-C and B-C), go to step 6.
Check power circuit for continuity as follows, make additional point-to-point continuity checks as
necessary to find individual malfunctioning component
To check continuity through K1, it is necessary to physically push up relay plunger while making