NOTE: Stingl Products does not recommend testing the main drain with an
influent valve, due to the possibility of eliminating variables such as spring-
loaded hydrostatic valves, and leaking or collapsing lines. Covering the sump
with a mat ensures that the entire line is tested from the sump to pump.
ERROR CODES & TROUBLESHOOTING
Problem Possible Cause Solution
The SR-500 will display several different error messages:
System Error 11 – Possible fused relay or Hydraulic Imbalance
System Err
or 12 – STP VACUUM LOW (reserved)
System Error 13 – STP VACUUM HIGH (reserved)
System Error 14 – RUN VACUUM LOW (reserved)
System Error 15 – RUN VACUUM HIGH – a condition exists that caused the
pump to pull more than 20” of Hg upon start up, (such as a packed pump trap or
clogged line).
No Power
(No display)
Breaker off/tripped
or improper wiring
Check and/or reset breaker
Verify that wiring is correct
Wrong power (error
message displayed)
SR-500 switch not set
properly
Verify that incoming power and
switch setting are the same
High Vacuum
(system error:
15 or 17
Clogged baskets or pump
trap, blocked drain,
improper valve setting
Remove debris/clean baskets
Verify valves are set for normal
operation
Low Vacuum
(system error:
16 or 17)
Stuck skimmer weir,
water level too low, high
filter pressure
Verify that weirs function smoothly,
top off to regular operating level,
backwash or clean filter as needed
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