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TROUBLESHOOTING
Problem
Nothing happens when the ther-
mostat is turned on
It takes a long time to heat the spa Low input voltage.......................
Spa does not reach temperature
Heating element continuously
burning out
Continuous shutdown of manual
reset high limit
Fuses blow or circuit breaker
opens
Contactor hum
Contactor chatter
Cause
Low flow..........................................
High limit.........................................
Thermostat not calling for heat.......
Undersized heater.........................
Heat loss from poor weather con-
ditions (cold, high winds)..............
Defective heating element............
Mis-adjusted knob-stop...............
Low flow...................................
High input voltage......................
Poor water chemistry......................
Heating element split open...........
Mis-adjusted or defective pressure
switch.........................................
Shorted heating elements.............
Undersized wire.........................
Circuit breaker or fuses too small..
Contactor contacts dirty or worn....
(NOTE: Some hum is normal)
Low flow................................... Check filter skimmer basket and
9
Solution
1. Check filter, skimmer basket,
pump.
2. If a 2-speed pump is used, turn
to high speed. If heater oper-
ates, adjust pressure switch for
low speed operation.
Push reset button.
Turn thermostat to higher tempera-
ture.
Call electric company.
Calculate temperature in Heat rise
°/hr.= Heater input (kw) x 410 divid-
ed by spa gallonage (This does not
take into account heat loss due to
weather).
Use spa cover.
Call electrician. Check resistance/
element bundle:
240V 11 kw = 5.0 to 5.8 OHMS
240V 5.5 kw = 10.0 to 11.6 OHMS
Re-adjust knob-stop.
Check filter, skimmer basket,
pump.
Call electric company.
See Water Chemistry on page 11.
Over-acid condition. Watch pH,
add acid slowly.
Replace pressure switch.
Replace element.
Replace wire.
Replace.
Replace contactor.
pump.
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