TM 10-4610-241-10
TO 4OW4-13-41
Table 3-2. Operator Troubleshooting (ROWPU) - cont.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10.
PUMP LAMP ON CONTROL BOX ASSEMBLY DOES NOT LIGHT WHEN SWITCH IS SET TO
START - cont.
Step 2.
Check to see if ROWPU is receiving power from power source. R.O. pump LOW PRESSURE LAMP
should be on and panel light should work if ROWPU is receiving power. Check that dimmer on lamp is
open.
a.
Set TEST INDICATOR LIGHT switch (44, figure 2-5) to TEST- If no lights come on, make sure
power source is securely plugged into junction box.
b.
Troubleshoot power source using applicable manual.
Step 3.
Check to see if associated pumps are operating. For R.O. pump, see if sheave is turning.
a.
If motor is running, replace switch indicator lamp bulb (para. 3-8).
NOTE
If new bulb does not light, notify unit maintenance to troubleshoot lamp socket and
wiring.
b.
If motor is not running, go to step 4.
WARNING
Electric shock can cause severe injury or death. Do not touch anything in the junction
box except the circuit breaker handle.
Step 4.
Check circuit breakers in junction box.
a.
Reset circuit breaker.
b.
Attempt to start pump.
c.
If pump will not start, notify unit maintenance.
3-11
