Rinnai ByPass Servo - User Manual

1 11112014GW
[Type text]
Tankless
Water Heater
Troubleshooting Manual
WARNING
There are a number of live tests that are required when fault finding this product. Extreme care should be used
at all times to avoid contact with energized components inside the product.
You MUST be a qualified service person before proceeding with these test instructions.
Before checking resistance readings, turn off power source to unit and then isolate each item to be checked
from the circuit by unplugging it.
When setting gas pressures on one of these units, please check the complete model number you are trouble-
shooting. Gas pressures and dip switches can vary among models. Always check the rating plate for complete
information and follow directions.
If any of the original wire as supplied with the appliance must
be replaced, it must be replaced with type 18 AWG wire or its
equivalent.
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
CAUTION

Rinnai ByPass Servo Specifications

General

Category	Water Heater
Type	Bypass Servo
Brand	Rinnai
Compatibility	Rinnai Tankless Water Heaters
Function	Controls water flow

Summary

Code 10 Troubleshooting Procedure

Air Supply or Exhaust Blockage

Procedure for diagnosing air supply or exhaust blockage issues.

Code 11 Troubleshooting Procedure

No Ignition

Troubleshooting steps for the unit failing to ignite.

Code 12 Troubleshooting Procedure

Flame Failure

Procedure for diagnosing flame failure errors.

Code 14 Troubleshooting Procedure

Thermal Fuse or Overheat

Troubleshooting steps for thermal fuse or overheat conditions.

Code 16 Troubleshooting Procedure

Over Temperature Warning (Safety shutdown because unit is too hot)

Procedure for addressing over-temperature safety shutdowns.

Code 31 Troubleshooting Procedure

Burner Thermocouple

Troubleshooting steps for burner thermocouple faults.

Code 32 Troubleshooting Procedure

Outgoing Water Temperature Thermistor Fault

Procedure for faults with the outgoing water temperature thermistor.

Code 33 Troubleshooting Procedure

Heat exchanger outgoing thermistor

Troubleshooting steps for heat exchanger outgoing thermistor faults.

Code 34 Troubleshooting Procedure

Combustion air temperature thermistor (Internal units ONLY)

Code 41 Troubleshooting Procedure

Freeze Protection Sensor for External Units

Code 51 Troubleshooting Procedure

Inlet Water Temperature Sensor

Code 52 Troubleshooting Procedure

Modulating Solenoid Valve Signal Abnormal (POV)

Code 57 Troubleshooting Procedure

Burner Overheat Bi-metal Switch

Code 58 Troubleshooting Procedure

Secondary Heat Exchanger Sensor

Code 61 Troubleshooting Procedure

Combustion fan Motor

Code 63 Troubleshooting Procedure

Circulation Flow Rate dropped below 1.3 GPM

Code 65 Troubleshooting Procedure

Water Flow Servo

Code 70 Troubleshooting Procedure

PC Board Fault

Code 71 Troubleshooting Procedure

SVO, SV1, SV2, SV3 Solenoid Valve Fault

Code 72 Troubleshooting Procedure

Flame Sensing Device Fault

Code 73 Troubleshooting Procedure

Burner Thermocouple Fault

Code 79 Troubleshooting Procedure

Water Leakage Detected

Troubleshooting Cold Water Sandwich: Faulty Fixture

Troubleshooting Cold Water Sandwich: Low Flow