Master Spas LS 750 User Manual download pdf (Page 9)

Hercules

OH Over temperature condition detected

FLO Flow problem

ICE Freeze condition detected

SN1 Hi-limit sensor failure

SN2 Temperature sensor failure

‘Ready’ & ‘Power’ Logo lights flashing Pressure switch open circuit

‘Power’ blue light flashing Hi limit fault

‘Ready’ green light flashing Temperature sensor fault

‘Ready’ icon flashing Control sensor open or short circuit

_ _ _ _ Hi limit

=:=:=:= Pressure switch open circuit

= = = = Pressure switch closed circuit

F0 Open circuit thermistor or 0c detected

F1 Thermostat reading 45c overheat

F2 Mechanical Hi-limit 45c

F3 Thermistor fault

F4 Flame Rollout detected

L Heater locked out 2 minutes

Hurricane

PS Pressure switch failure

SH Shorted sensor

OP Open sensor

LO Low temp, potential freeze

HL Hi-limit

OH Overheat

FLO Flow problem

ICE Freeze condition detected

SN1 Hi-limit sensor failure

SN2 Temperature sensor failure

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