Control Logic - Flow Chart - Raypak X94 Installation & Operating Instructions Manual

CONTROL LOGIC - FLOW CHART (POOL AND SPA MODES)
Power On
Is the water
temperature displayed?
YES
Push MODE
button to select
"Pool" or "Spa"
Push UP or DOWN
button to scroll to
desired temperature
Water temperature
and set
temperature
displayed?
YES
"Purge"
"Spark"
Water temp displayed?
(rectified)
YES
Heater Fired?
YES
END
• Check On/Off switch (under lid on control panel)
NO
• Check for 120 volts to the transformer
(time clock, circuit breaker, wire connections)
• Check for 24 volts to Circuit Board (P6 connector)
NO
"Sensor Failure," "Sensor Open" or "Sensor Short" -
Temperature sensor out of range (replace sensor)
Inspect thermistor, wires, and connector at Terminal P1
Check resistance value of the thermistor. Reference to chart below.
Replace thermistor if not within 10% of values shown below.
If okay, replace Circuit Board.
Temp Degrees F
Temp Degrees C 4.4
Resistance (k)
If okay, replace Circuit Board
"Water Sw Open"
"Hi Limit 1 Fault"
"Hi Limit 2 Fault"
"Clock/Fireman Sw"
NO
"Blocked Vent"
"EOL" (at start-up)
"Ignition Lockout"
"Ignition Failure"
NO
Verify power at MV on P-4 Terminal on digital circuit board.
Verify power to valve MV voltage. (Replace valve.)
"Remote" and Water Temperature displayed
(a remote control is controlling the heater)
Note: Disconnect the remote by turning the
remote function off. (Press and hold the UP
and DOWN buttons for 5 seconds.)
NO
Is a fault code displayed and flashing?
YES
Diagnostic Readouts
Sensor Failure
Sensor resistance at various temperatures
40 50 60 70
10 15.6 21.1 26.7 32.2
261.1 199.0 153.1 118.8 93.0 73.3
Water flow switch. Verify water flow and pressure. If water
connections were reversed, verify the location and direction
of the water flow across the flow switch.
CLEAN FILTER / STRAINER - backwash if neccessary.
High limit switch. Verify water flow. Inspect internal
bypass valve.
Fireman or Remote switch connected to safety loop is in the
OFF mode.
Vent switch open. Check connections to the board.
Check for blockages in the vent.
Check for stuck MODE button.
Ignition lockout. Check spark (bad ignition circuit or
hi-tension wire).
Ignition failure. Verify gas to the heater. Verify valve operation
(manifold pressure at tapping downstream of gas valve.)
45
80 90 100 106
37.8 41.1
58.3 51.0