Rinnai REU-K2430WG Service Manual page 24

Fault Finding Table
Code on Controller Fault
Power interruption during Bathfill. Water will not flow
03
when power restored.
Combustion fan current too high. Unit operates, then
10
stops.
No ignition. Unit stops without flame igniting
11
Flame Failure / Earth Leakage
12
Thermal fuse and/or overheat switch activated. Unit
operates, then stops.
14
Over temperature warning. Unit operates, then stops.
16
32 Outlet water thermistor flow
33 Heat exchanger thermistor error
Modulating solenoid valve fault. Unit stops without
52
flame ignition.
61 Combustion fan rotation error
Water flow control device error. Water flow is not
65
controlled. Water temperature too low.
71 Solenoid valve circuit error. Unit does not operate.
72 Flame rod circuit error. Unit does not operate.
Appliance does not operate at all. No display on the
water controllers (if fitted).
-
No combustion despite water control indicating that
combustion is occurring - if water controller(s) fitted)
-
Combustion stops during operation.
-
Cannot adjust the hot water temperature via the water
controller(s) - only if controller(s) fitted.
-
Anti-frost heater does not operate.
-
REU-K2430WG-AK (Envirosmart )
Action
1. Turn off all hot water taps.
1. Press the ON/OFF button on a controller twice.
1. Check blockage of air intake/flue outlet.
2. Check combustion fan.
1. Check gas supply
2. Check sparker unit
3. Check gas valves
1. Check gas supply
2. Check flame rod
3. Check earth wire lead
4. Check water control
1. Check thermal fuse
2. Check overheat switch
IMPORTANT- If thermal fuse or overheat switch were faulty :
a. Check heater for damage
b. Confirm "Gas Type" and "Combustion" dip switch settings
c. Confirm test point pressures
1. Confirm "Gas Type" and "Combustion" dip switch settings
2. Confirm test point pressure
3. Check gas valves
4. Check water flow sensor
5. Check water flow servo
6. Check heat exchanger outlet temperature thermistor
7. Check hot water outlet temperature thermistor
Check hot water outlet thermistor
Check heat exchanger thermistor
Check modulating solenoid valve
Check combustion fan
Check water flow servo
Check gas valves
Check flame rod
1. Check power cord plugged in and supply turned on.
2. Check power supply voltage.
3. Check electrical fuse.
4. Check transformer.
5. Check gas valves
6. Check sparker unit.
7. Check earth leads and connections.
8. Check for short circuits.
9. Check water controller(s) - if fitted.
1. Check water flow sensor.
2. Check flame rod.
3. Check heat exchanger outlet thermistor.
4. Check hot water outlet thermistor.
5. Check combustion fan.
6. Check the sparker unit.
7. Check gas valves.
8. Check thermal fuse.
9. Check overheat switch.
IMPORTANT - If thermal fuse or overheat switch were faulty:
a) check heater for damage;
b) confirm "Gas Type" and "Combustion" dip switch settings;
c) confirm test point pressure.
1. Check gas supply
2. Check flame rod
3. Check earth leads and connections.
1. Check hot water outlet thermistor.
2. Check heat exchanger outlet thermistor.
3. Check gas valves
4. Check water flow servo.
5. Check bypass servo.
1. Check anti-frost heater components
2. Check frost sensing switch
- 20 - Issue 1 - 16/12/09 ©Rinnai