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DIAGNOSTICS
The RP2100 Digital heater is equipped with on-board
diagnostic controls. If there is a safety fault, a fault code
will be displayed along with a service indication.
NOTE: The digital temperature display may not coincide with the temperature reading of your pool or spa
thermometer. The RP2100 reads the water temperature at the inlet of the heater. 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.
If the PRS fault code is displayed, it indicates that
there is insufficient flow through the heater. Make sure
the pool filter and pump strainer are clean before calling
a service representative.
STATUS CODES
Display Definition
CFH Call for heat
CLK Time clock
LOW Caution - low water temperature
OFF Off mode
REM Remote control activated
SPK Spark
SPR Spare fault code indicator
FAULT CODES
Display Definition
BD1 Board failure
FFL Flame sensing when pilot and gas
valves are closed
HL1 Hi limit switch #1 open
HL2 Hi limit switch #2 open
IGN Ignition control failure
ILO Ignition lock out
PLT Pilot failure
PRS Pressure switch open
ROL Heat roll-out safety switch open
SNS Sensor failure
VNT Vent switch open
PROGRAM MODES
Display Definition
CCC Celsius setting
F/C Change from Fahrenheit to Celsius
FFF Fahrenheit setting
RES Reset defaults
SET Set point max adjustment
READING A FAULT
The word “SERVICE” will flash on and off if the PC board
detects a known fault. The fault will be displayed in
three big letters on the lower left of the display.
SERVICE WILL FLASH
3 LETTER FAULT CODE
See table for fault definition
Fig# 9482
Fig# 9485