Control Logic - Flow Chart - Raypak AVIA 264A Installation And Operation Manual

Control Logic - Flow Chart

Control Logic – Flow Chart
START
Power On
Is the Display lit?
YES
Push MODE
Select "Pool" or "Spa"
Push UP or DOWN
arrows to adjust
Temperature
Is Water Setpoint and
Water Temperature
displayed?
YES
Blower "Pre-Purge"
for 45 sec
Spark
Is Water Setpoint,
Temperature and
"Heating" displayed?
YES
Unit Heating until
demand is satisfied.
Was Water
Temperature
reached?
YES
Blower "Post-Purge"
for 3 minutes
Wait for new Heat
demand
END
Fahrenheit
Inlet Sensor
Outlet Sensor
Fahrenheit
Flue Sensor
• 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)
"Remote" and Water Temperature displayed?
If Remote mode is set to control the heater,
Exit Remote control by pressing UP + DOWN.
Is a Fault Message displayed?
NO
Check for damaged or loose wires and terminals.
In Sensor Fault
Verify sensor per "Temperature-Resistance" table:
Inlet , Outlet or Inlet , Outlet or Vent
- Replace Sensor if readings are out of range.
Temp [Open/Short] Flue Sensor
- Replace Ignition board if sensor readings are right.
[Open/Short]
Gas Valve Check voltage at valve terminals. If terminals are
energized replace control boards, if not replace valve.
Flame w/o CFH
Low Voltage Replace transformer if voltage is below 24VAC.
Check for damaged or loose wires and terminals.
Diff Sw Closed
NO
Check Blower and Air Pressure switch:
- Replace Pressure switch if failing open or close.
Diff Sw Open
- Replace Blower if operation is intermittent.
Fan Lockout
Ing Try Failure
Check Gas valve, Gas supply and spark igniter:
- Check gas supply and valve operation.
Ign 60 min Delay
- Check Igniter and wire. Replace if damaged.
Ignition Lockout
Check for damaged or loose wires and terminals.
Clock/Fireman Sw Switch connected to safety loop is in OFF mode.
NO
Water Sw Open Verify water flow / pressure. Clean Filter/Strainer.
Vent Sw Open
Vent switch open. Troubleshoot extractor if installed.
Hi Limit 1 Fault Temperature Limit switch open. Verify water flow.
Hi Limit 2 Fault Inspect internal thermostat (Unitherm Governor) and
Cabinet Temp Lm bypass valve.
Air SW Open Air Pressure Switch failed in operation. Verify Blower
Diff Sw Fault operation. Check for air inlet/outlet obstructions. Verify
Fan Lockout air pressure.
Flame Lost Verify gas supply. Verify gas valve operation.
Flame Flickering Cut power, verify and clean igniter rods.
Flue Over Temp Verify obstructions. Troubleshoot extractor if installed.
Outlet Over Temp Verify water flow. Verify gas supply and combustion.
Low Flow Fault Verify water flow. Verify Pump operation. Adjust Flow as
High Flow Fault necessary. Verify filter pressure and clean if needed.
Temperature-Resistance (kΩ)
Below
6.3 40 50 60
Celcius -14 4 10 15
fault 261 199 153
fault 26 20 15
Temperature-Resistance (kΩ)
Below
< 7.5 50 75 100
Celcius < -13 10 24 38
fault
1.03 1.09 1.14
NO
YES
Above
70 80 90 100 110
21 27 32 38 43
119 93 73 58 46 fault
12 9.3 7.3 5.8 4.6 fault
Above
125 150 200 300 400
51 65 93 149 204
fault
1.19 1.25 1.35 1.57 1.77
187
86
464
240
49