Raypak 337A, 406A Diagnostics, Reading A Fault, Status Codes, Program Modes, Display, Definition

NOTE: The LCD temperature display may not agree with the temperature reading of your pool or spa ther- mometer. The heater reads the water temperature at the inlet. Due to the circulation characteristics of any pool or spa, the water temperature at the inlet to the heater may differ from that observed at a given location in the pool or spa.

DIAGNOSTICS READING A FAULT

The digital thermostat models are equipped with on- board diagnostic controls. If there is a safety fault, a fault code will be displayed along with a service indication.

If the PRS fault code is displayed, it indicates that there is insufficient water flow through the heater. Make sure the pool filter and pump strainer are clean before calling a service representative.

The word “SERVICE” will flash on and off if the PC board detects a known fault. The fault will be dis- played in three big letters on the lower left of the dis- play.

3 Letter	Service Will
	Flash
Fault Code

See table
for fault
definition	Fig.# 9485

Fig.# 9482

STATUS CODES		PROGRAM MODES
Display	Definition	Display	Definition
CFH	Call for heat	CCC	Celsius setting
CLK	Time clock	F/C	Change from Fahrenheit to Celsius
EOL	End of line test (Factory Use Only)	FFF	Fahrenheit setting
LON	Low NOx Unit	RES	Reset defaults
LOW	Caution-low water temperature	SET	Set point max adjustment
OFF	Off mode
PRO	Propane gas configured
REM	Remote control activated
SPK	Spark
SPR	Spare fault code indicator
FAULT CODES
Display	Definition
BD1	Board failure
EEP	Microprocessor error
FAN	Blower pressure failure
FFL	Flame sensing when pilot and gas
	valves are closed
GVC	Gas valve closed
GVO	Gas valve open
HL1	High limit switch #1 open
HL2	High limit switch #2 open
IGN	Ignition failure
ILO	Ignition lockout
PLT	Pilot failure
PRS	Water pressure switch open
ROL	Heat roll-out safety switch open
SNS	Sensor failure
VNT	Vent switch open

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