Control Logic - Flow Chart - Rheem Raypak AVIA 264 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"
MODE MODE
Push UP or DOWN
UP UP
arrows to adjust
Temperature
DOWN DOWN
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
50
Fahrenheit (°F)
Celsius (°C)
Inlet Sensor (kΩ)
Outlet Sensor (kΩ)
Fahrenheit (°F)
Celsius (°C)
Flue Sensor (kΩ)
• Check On/Off switch (under lid on control panel)
• Check for 240 or 120 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.
Flue Sensor Temp [Open/Short]
- 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 Check main voltage if voltage is below 23VAC.
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
air pressure.
Fan Lockout
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.
Below Temperature-Resistance
6.3 40 50 60 70
-14 4 10 15 21
open 261 199 153 119
open 26 20 15 12
Below Temperature-Resistance
< 7.5 50 75 100 125
< -13 10 24 38 51
short
1.03 1.09 1.14 1.19
NO
YES
Above
80 90 100 110 187
27 32 38 43 86
93 73 58 46 short
9.3 7.3 5.8 4.6 short
Above
150 200 300 400 464
65 93 149 204 240
open
1.25 1.35 1.57 1.77