9
Diagnostics Chart continued
Condition Pump Area Possible Problem Solution
Pump Won’t
Start
Motor Stalled
hot/cold
Damaged motor
Damaged pump
Closed intake/gas ballast on
pumps
Repair or replace
Replace/call factory
Open intake fitting and gas
ballast
Ultimate of pump
does not meet mfg.
spec (when read
with thermocouple
gauge)
Low voltage
Cold weather cut-out
Dirty Oil
Shorter extension cord
Open intake fitting for 10-15
sec. to warm up while starting
Flush 1 to 3 times
Unusually
Noisy
Motor Areas
Worn motor
Loose motor bolts
Drive coupling
Replace motor
Tighten bolts
Adjust/replace coupling
Pump Cartridge
Dirt, low, improper oil
Air leaks:
1. Caps/connections
2. Gaskets/O-rings
3. Fittings
4. System leak
Flush and replace oil
Tighten
Replace/put on oil
Replace/reseal
Isolate pump with blank-off
value and repair system leak
High Temp.
Motor Low voltage Short extension cord
Pump
Dirty oil
Low oil
Lint/foreign material
Parts friction
Too small for system
Air leaks
Flush and replace
Add/replace
Open gas ballast
Replace oil/call factory
Size pump for system
Replace/repair
Poor Vacuum Noisy Pump
System leaks
Low oil level
Dirty oil
Worn pump
Air leaks and fittings or
gasket seals
Repair leaks
Add/replace
Flush 1 to 3 times
Replace module, call factory
Replace/repair
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