Rinnai REU - 16 FUA - E - Manual (Page 16)

16
ERROR MESSAGES
Rinnai water heaters have the ability to check their own operation continuously. If a fault
occurs, an error code will flash on the Digital Display if you have temperature controllers
installed. This assists with diagnosing the fault, and may enable you to overcome a
problem without a service call. Please quote the code displayed when enquiring about
service. Some of these remedies can not be checked by the user because they require
the front to be taken off of the unit. They are included so that you can give the
information to the gas engineer.
* In all cases, you may be able to clear the Error code by turning the hot water tap OFF, then ON
again. If this does not clear the error, try pushing the On/Off button OFF then ON again. If the Error
Code still remains contact Rinnai or your nearest service agent for advice.
** Faults caused by insufficient gas/water supply or gas/water quality and installation errors are not
covered by the manufacturer’s warranty.
Regular maintenance should be performed by a competent person in accordance
with the local regulations at least once annually.
Code
Displayed
Fault Remedy
- Noticeable reduction in water
flow
Inlet water filter needs to be cleaned.
10 Not enough combustion air Check for physical blockages around
air intake or exhaust. Check combus-
tion fan.
11 No Ignition / Gas supply Check gas valves, gas supply and
ignition unit.
12 Flame failure / Earth Leakage Check gas valves and gas supply.
Check flame rod.
Check earth wire lead.
Check remote control.
14 High flame safety device Check overheat circuit
16 Over temperature warning Modulating control valve problem or
water flow control valve problem
32 Outgoing water temperature
sensor faulty
Check Hot Water Thermistor and wire
34
Combustion Air temperature
sensor faulty
Check Air Intake Thermistor and wire
61 Combustion fan failure Check Combustion Fan
71 Micro-processor failure or Sole-
noid circuit failure
Check solenoids and pcb.
72 Flame rod circuit error Check flame rod and pcb.
52 Gas modulating valve faulty Check gas modulating valve and pcb.