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