Raypak 206A Installation & Operating Instructions Manual - page 50
50
Power On
Is the water
temperature displayed?
NO
YES
Push MODE
switch to select
"Pool" or "SPA"
Push Temp
arrow to scroll to
desired temperature
NO
Water temperature
and set
temperature
displayed?
YES
CFH (call for heat)
or “Heating” will
display briefly
NO
NO
YES
YES
Flame icon displayed
and flashing?
OR
Water temp displayed?
(pilot lit and rectified)
Heater Fired?
END
• Check On/Off switch (under lid on control panel)
• Check for 120/240 volts to the transformer
(time clock, circuit breaker, wire connections)
• Check for 24 volts to Circuit Board (P6 connector)
REM and Water Temperature
displayed and flashing
(a remote control is controlling the heater)
Note: Disconnect the remote by turning the remote
function off. See page 36 or page 40 for instructions.
NO
YES
Is SERVICE or a fault code displayed and flashing?
Diagnostic Readouts
"SNS" or “Sensor Failure,” “Sensor Open” or “Sensor Short” -
Temperature sensor out of range (replace sensor)
Verify power at MV on P-4 Terminal on digital circuit board.
Verify power to valve MV voltage. (Replace valve.)
SPK or “Spark”
Sensor Failure
Inspect thermister, wires, and connector at Terminal P1
Check resistance value of the thermister. Reference to chart below.
Replace thermister if not within 10% of values shown below.
If okay, replace Circuit Board.
Temp Degrees F 40 50 60 70 80 90 100 106
Resistance (k)
261.1 199.0 153.1 118.8 93.0 73.3 58.3 51.0
If okay, replace Circuit Board
Sensor resistance at various temperatures
PRS or “Water Sw Open”
Pressure switch. Verify water flow and pressure
CLEAN FILTER / STRAINER - backwash if neccessary.
HL1 or “Hi Limit 1 Fault”
High limit switch. Verify water flow. Inspect internal
HL2 or “Hi Limit 2 Fault”
Thermostat (Unitherm Governor) and bypass valve.
ROL or “Rollout Sw Open”
Rollout Sensor - Check for blocked heat exchanger and soot.
Atmospheric Units - Replace fusible link.
Lo NOx Units - Press manual reset button.
CLK or “Clock/Fireman Sw” Fireman or Remote switch connected to safety loop is in the
OFF mode.
VNT or “Vent/Field Sw #1”
Vent switch open. Check connections to the board.
If extractor installed, troubleshoot extractor.
ILO or “Ignition Lockout”
Ignition lockout. Check power at pilot valve. Check spark (bad
ignition circuit or hi-tension wire). Verify clean pilot orifice and
clearance from igniter to ground hood.
IGN or “Ignition Failure”
Ignition failure. Verify gas to the heater. Verify valve operation
(gas present at tube fitting).
DIGITAL/AFT CONTROL LOGIC - FLOW CHART