9
TROUBLESHOOTING
Problem
Cause
Solution
Nothing happens when the ther-
mostat is turned on
Low flow..........................................
High limit.........................................
Thermostat not calling for heat.......
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.
It takes a long time to heat the spa Low input voltage…………………..
Undersized heater……...................
Heat loss from poor weather con-
ditions (cold, high winds)……….....
Defective heating element………...
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
Spa does not reach temperature
Mis-adjusted knob-stop……………
Low flow……………………………..
Re-adjust knob-stop.
Check filter, skimmer basket,
pump.
Heating element continuously
burning out
High input voltage………………….
Poor water chemistry......................
Heating element split open………..
Call electric company.
See Water Chemistry on page 11.
Over-acid condition. Watch pH,
add acid slowly.
Continuous shutdown of manual
reset high limit
Mis-adjusted or defective pressure
switch…………………….................
Replace pressure switch.
Fuses blow or circuit breaker
opens
Shorted heating elements………....
Undersized wire…………………….
Replace element.
Replace wire.
Contactor hum
Circuit breaker or fuses too small..
Contactor contacts dirty or worn….
(
NOTE:
Some hum is normal)
Replace.
Replace contactor.
Contactor chatter
Low flow…………………………….. Check filter skimmer basket and
pump.
