Control Logic - Flow Chart - Rheem Raypak R207A Installation And Operation Manual

Control Logic - Flow Chart

Power On
Is the water
temperature displayed?
YES
Push MODE
switch to select
"Pool" or "Spa"
Push Temp
arrow to scroll to
desired temperature
Water temperature
and set
temperature
displayed?
YES
"Heating" will
display briefly
"Spark"
Flame icon displayed
and flashing?
OR
Water temp displayed?
(pilot lit and rectified)
YES
Heater Fired?
YES
END
• Check On/Off switch (under lid on control panel)
• Check for 120/240 volts to the transformer
NO
(time clock, circuit breaker, wire connections)
• Check for 24 volts to Circuit Board (P6 connector)
"Remote" and Water Temperature displayed
Note: Disconnect the remote by turning the
remote function off. See page 28 for instructions.
NO
"Sensor Failure," "Sensor Open" or "Sensor Short" -
Temperature sensor out of range (replace sensor)
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
Temp Degrees C
Resistance (k)
If okay, replace Circuit Board
"Water Sw Open"
"Hi Limit 1 Fault"
"Hi Limit 2 Fault"
"Rollout Sw Open"
"Clock/Fireman Sw"
"Vent/Field Sw #1"
NO
"Ignition Lockout"
"Ignition Failure"
Verify power at MV on P-4 Terminal on digital circuit board.
NO
Verify power to valve MV voltage. (Replace valve.)
(a remote control is controlling the heater)
NO
Is a fault code displayed and flashing?
YES
Diagnostic Readouts
Sensor Failure
Sensor resistance at various temperatures
50 60 70
4 10 15 21
261.1 199.0 153.1 118.8 93.0 73.3
Pressure switch. Verify water flow and pressure
CLEAN FILTER / STRAINER - backwash if neccessary.
High limit switch. Verify water flow. Inspect internal
Thermostat (Unitherm Governor) and bypass valve.
Press manual button on HL1 fault on brass (ASME) models.
Rollout Sensor - Check for blocked heat exchanger and soot.
Press manual reset button.
Fireman or Remote switch connected to safety loop is in the
OFF mode.
Vent switch open. Check connections to the board.
If extractor installed, troubleshoot extractor.
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 rod.
Ignition failure. Verify gas to the heater. Verify valve operation
(gas present at tube fitting).
80 90 100 106
27 32 38 41
58.3 51.0
39