Rinnai RHFE-551FA User manual

Direct Vent
Service Manual
RHFE-551FA
RHFE-1001FA
RHFE-1001FA/VA
RHFE-201FA
RHFE-263FA, FAII
RHFE-431FA, FAII, FAIII, WTA
RHFE-556FA, FAII, FAIII, FTRA, FTRAIII, WTA
RHFE-1004FA
ES08 RHFE-201RFA
ES11 RHFE-263RFA
ES17 RHFE-433RFA
EX17 RHFE-433RWTA
ES22 RHFE-558RFA
EX22 RHFE-558RWTA
ES38 RHFE-1004RFA, RHFE-1004FTA
EX08C RHFE-202FTA
EX11C RHFE-265FTA
EX17C RHFE-434FTA
EX22C RHFE-559FTA
200000014 Rev A
5/2012

2 Rinnai Direct Vent Service Manual
Table of Contents
General Information....................................................3
Specifications .............................................................4
Sequence of Operations.............................................6
Fault Isolation
Accessing Fault Codes............................................7
Fault Isolation Codes...............................................9
Fault Isolation - Other Issues ................................11
201FA, 201RFA
Troubleshooting ....................................................12
Wiring Diagram .....................................................14
Ladder Diagram ....................................................15
263FA, 263FAII, 263RFA
Troubleshooting ....................................................16
Wiring Diagram .....................................................18
Ladder Diagram ....................................................19
202FTA, 265FTA
Troubleshooting ....................................................20
Wiring Diagram .....................................................21
Ladder Diagram ....................................................22
431FA Series, 556FA/FTRA Series
Troubleshooting ....................................................23
Wiring Diagrams
431FA Series, 556FA/FTRA...........................26
556FAIII ..........................................................27
556FTRAIII......................................................28
431WTA, 556WTA
Troubleshooting ....................................................29
Wiring Diagrams (431WTA) ..................................32
Wiring Diagrams (556WTA) ..................................33
433RFA, 558RFA
Troubleshooting ....................................................34
Wiring Diagram .....................................................35
Ladder Diagram ....................................................36
433RWTA, 558RWTA
Troubleshooting ....................................................37
Wiring Diagram .....................................................38
Ladder Diagram ....................................................39
434FTA, 559FTA
Troubleshooting ...................................................40
Wiring Diagram .....................................................41
Ladder Diagram ....................................................42
551FA, 1001FA, 1001FA/VA
Troubleshooting (551FA) ......................................43
Fault Finding Charts..............................................45
Wiring Diagram (551FA) .......................................55
Troubleshooting (1001FA) ....................................56
Fault Finding Charts..............................................58
Wiring Diagram (1001FA) .....................................61
Troubleshooting (1001FA/VA) ..............................62
Fault Finding Charts ............................................. 64
Wiring Diagram (1001FA/VA)............................... 68
Lockout Check List ............................................... 69
1004FA, 1004RFA, 1004FTA
Troubleshooting Information ............................. 71
Wiring Diagram.................................................. 73
Ladder Diagram ................................................ 74
Lockout Check List............................................ 75
Extension Installation Requirements ...................... 76
Vent Kits and Extension Sets .................................. 78
Vent Extension Covers............................................ 79
Installations at Altitude............................................. 79
Gas Pressure Setting Procedure
201FA, 263FA, 263FAII .................................... 80
201RFA, 263RFA.............................................. 82
202FTA, 265FTA............................................... 85
431FA/WTA, 556FA/WTA................................. 87
433RFA, 558RFA.............................................. 89
433RWTA, 558RWTA ....................................... 92
434FTA, 559FTA............................................... 95
1004FA.............................................................. 97
1004RFA, 1004FTA .......................................... 98
Dip Switch Settings................................................ 101
Checking Micro-Amps
(431, 556, 201, 263) .............................................. 102
Setting up the U Tube Manometer
(431, 556, 201, 263) .............................................. 103
Thermistor.............................................................. 104
Flame Rectification ................................................ 104
Setting a Maximum Temperature .......................... 105
Harmonic Noise (1004FA) ..................................... 105
Removal of “OF” on New PC Board
Installation.............................................................. 106
Wire Diagram Abbreviations.................................. 110
Serial Number Format ........................................... 111

Rinnai Direct Vent Service Manual 3
General Information
Safety Definitions
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and
others.
Indicates an imminently hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result in minor or
moderate injury. It may also be used to alert against unsafe practices.
DANGER
CAUTION
WARNING
Recommended Tools
• Volt/Ohm/Amp meter with test probes
• U tube type manometer with 14 inch water column (W.C.) scale, two hoses and two 1/8 inch taps
• assorted wrenches including a 3/16 Allen wrench
• assorted screw drivers
• leak solution or leak detector
Using this Manual
Repairs should be performed by a qualified service technician.
The following information can be referenced for additional information.
• Operation and Installation Manual
• Conversion Manual
• Technical Bulletins
Technical Support
Technicians are available to assist in servicing issues. Contact Rinnai Technical Services at 1-800-621-9419.
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 furnace. Before checking for resistance readings
disconnect the power source to the unit and isolate the item from the circuit (unplug it).
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

4 Rinnai Direct Vent Service Manual
Specifications
201FA 263FA, FAII
202FTA
(EX08C) 265FTA
(EX11C)
1004FA
1004RFA
(ES38)
1004FTA
(ES38)
551FA 1001FA
1001FA/VA
BTU Input NG 3,000-8,000 5,500-11,000 3,000-8,000 5,500-11,000 10,500-38,400 22,000 (max) 38,400 (max) BTU Input LP 3,000-8,000 5,700-11,000 3,000-8,000 5,700-11,000 10,500-36,500 21,000 (max) 36,500 (max) AFUE Rating NG 80.6% 80% 81% 80% 80.6% NA NA AFUE Rating LP 83.4% 80% 82% 81% 82% NA NA Gas Supply Pressure (NG)
4.5-10.5 in
(114-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
4.5-10.5 in
(114-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
5.0-10.5 in (127-
267 mm) W.C.
4.5-10.5 in (114-
267 mm) W.C.
5.0-10.5 in (127
-267 mm) W.C.
Gas Supply Pressure (LP)
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
11-13 in
(279-330 mm)
W.C.
11-13 in
(279-330 mm)
W.C.
11-13 in
(279-330 mm)
W.C.
Electrical Connection (at high fire)
AC 120V,
60 Hz,
42 watts
AC 120V,
60 Hz,
47 watts
AC 120V,
60 Hz,
41 watts
AC 120V,
60 Hz,
44 watts
AC 120V,
60 Hz,
121 watts
AC 120V,
60 Hz,
120 watts
AC 120V,
60 Hz,
120 watts
Sound Level 27-34 dB(A) 31-38 dB(A) 27-36 dB 31-38 dB 37-47 dB(A) 35-44 dB(A) 35-46 dB(A) Fan CFM 48.3-78.6 96.4-128.5 48.3- 78.6 96.4-128.5 203.4-360.6 135-189 179-289 Weight 39.4 lbs
(17.9 kg) 37 lbs (17 kg) 46 lbs (21 kg) 46 lbs (21 kg) 90 lbs (41 kg) 74 (34 kg) 110 (50 kg)

Rinnai Direct Vent Service Manual 5
431FA
Series, WTA 556FA/FTRA
Series, WTA 433RFA
(ES17) 558RFA
(ES22) 433RWTA
(EX17) 558RWTA
(EX22) 434FTA
(EX17C)
BTU Input NG 8,200-16,700 8,200-21,500 8,200-16,700 8,200-21,500 8,200-16,700 8,200-21,500 8,200-16,700
BTU Input LP 8,200-16,700 8,200-20,700 8,200-16,700 8,200-20,700 8,200-16,700 8,200-20,700 8,200-16,700
AFUE Rating NG 80.8% 80.6% 81% 81% 81% 80.6% 81% Gas Supply Pressure (NG)
3.5-10.5 in
(89-267 mm)
W.C.
5.0-10.5 in
(127-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
3.5-10.5 in
(89-267 mm)
W.C.
Gas Supply Pressure (LP)
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
Electrical Connection (at high fire)
AC 120V,
60 Hz*,
40 watts
AC 120V,
60 Hz*,
55 watts
AC 120V,
60 Hz*,
45 watts
AC 120V,
60 Hz,
50 watts
AC 120V,
60 Hz,
47 watts
AC 120V,
60 Hz,
47 watts
AC 120V,
60 Hz,
46 watts
Sound Level 32-38 dB(A) 32-41 dB(A) 32-42 dB 32-39 dB 32-41 dB 32-41 dB 33-38 dB Fan CFM 110.5-141.3 110.5-162.7 110.5-141.3 110.5-162.7 110.5-141.3 110.5-162.7 110.5-141.3
Weight 51 lbs (23 kg) 51 lbs (23 kg) 53 lbs (24 kg) 53 lbs (24 kg) 51 lbs (23 kg) 51 lbs (23 kg) 57 lbs (26 kg)
AFUE Rating LP 81% 81% 80% 80% 81% 81% 82%
559FTA
(EX22C)
8,200-21,500 8,200-20,700
80% 82%
3.5-10.5 in
(89-267 mm)
W.C.
8-13 in
(203-330 mm)
W.C.
AC 120V,
60 Hz,
46 watts
33-42 dB
110.5-162.7
57 lbs (26 kg)
Specifications
* 60 Hz must be maintained or the sound levels (dB) may change.

6 Rinnai Direct Vent Service Manual
Sequence of Operations
1. The blower (combustion) motor fan starts and purges the combustion and heat exchanger
chambers making sure that they are clear. The green LED light is on.
2. The blower stages down and the ignition module powers the spark igniter and spark
occurs. When the spark is sensed as being correct, the PCB allows voltage to the
solenoid gas valves and gas enters the chamber. Ignition occurs and the flame rod begins
to prove flame. The blower motor stages back up to high. When the burner is on the LED
glows red indicating the burner is on. If the flame is correct and a secure ground is
available, then the flame rod produces micro-amps and the unit will fire trying to reach your
set room temperature.
3. The convection (room blower) will start on low speed circulating warm air into the structure.
After the PCB compares the set temperature to the room temperature, the seven stage gas
valve and fan control will fire the unit at the most efficient rate to obtain the comfort level as
set.
4. The negative co-efficient thermistor will sense the room temperature at the floor level and
will provide feedback to the PCB to determine the firing rate, fan speed, and run time.
When the set temperature is reached, the red indicator will return to green indicating the
burner is off. The convection fan will continue to run cooling the exchangers and
electronics for about 4 minutes.
5. The LED will be green indicating the unit is on standby. When the structure temperature
drops, the process starts over again.
6. Fresh air for combustion is drawn from outside and exhaust air is eliminated to the outside.
Moisture coming from the vent outside is normal as most high efficient units produce
moisture.

Rinnai Direct Vent Service Manual 7
Fault Isolation
If there is a malfunction the appliance may shut down
as a safety precaution and display a fault code to
assist in diagnosing the problem. The fault code will
flash in the display on the control panel.
Fault codes should be used to assist in identifying the
cause of the failure.
After the problem has been corrected, the fault code
will clear only after the appliance has been turned off
and back on. The code will be stored into the memory.
Some faults may cause a hard lockout where the
appliance shuts off and corrective action is required
before the appliance will operate.
Accessing Fault Codes
Up to 10 fault codes are stored in the PC Board and can be recalled by simultaneously pressing the “Economy”
button and both temperature control buttons for 2.5 seconds while the appliance is turned OFF. After the buttons
are released, the fault codes will be displayed in 2 second intervals beginning with the most recent fault code.
Models with analog controls and models with digital LED’s each have their own set of fault codes.
On models RHFE-431WTA, RHFE-556WTA, RHFE-556FTRA:
Under SET the codes in memory are numbered 1 through 10 with “1” as the
most recent. Under ROOM the fault code will be displayed.
Models with analog controls:
The fault code will display by lighting up 1 to 4 of the temperatures at
the same time. For example, if the temperatures 60, 64, and 68 are lit
up then the fault code is 60*64*68 - Abnormal Combustion Fan RPM.
On models all other models with digital controls:
The codes in memory are numbered 1 through 10 with “1” as the most
recent. The temperature display will show “1” and then show the most
recent fault code. A “2” will then be displayed followed by the second
most recent fault code. The 10 most recent fault codes will be displayed
in this manner.
SET ROOM
1 61
SET ROOM
2 14
1 61 2 14
LO 60 64 68 72 76 80 HI

8 Rinnai Direct Vent Service Manual
RHFE-431WTA,
RHFE-556WTA,
RHFE-433RWTA,
RHFE-558RWTA
5082 combustion hours
18420 combustion cycles (multiply displayed number by 10)
125 power failures
Accessing Operation History
RHFE-431FA, RHFE-556FA
After the fault codes, the heater will display the combustion hours and combustion cycles (number of times the
unit is turned on and off). The combustion time will display first in two parts followed by the combustion cycles
displayed in two parts.
Combustion Time
1. The temperature display will indicate a 16 digit binary number. A light indicates a “1”. A position not lighted,
indicates a “0”. Read this number using the example below.
LO 60 64 68 72 76 80 HI
LO 60 64 68 72 76 80 HI
LO 60 64 68 72 76 80 HI
LO 60 64 68 72 76 80 HI
This indicates the first 8 digits as follows: 0 1 0 0 0 0 0 1
This indicates the next 8 digits as follows: 1 1 0 1 0 0 0 0
2. Use a calculator with binary and decimal functions. Set the calculator to binary, “BIN”, and enter the 16 digits.
(0 1 0 0 0 0 0 1 1 1 0 1 0 0 0 0 in the example above.)
3. Press the decimal function, “DEC”, and the combustion time in hours will display. The combustion hours in
this example is 16848.
Combustion Cycles
1. The temperature display will indicate a 16 digit binary number. A light indicates a “1”. A position not lighted,
indicates a “0”. Read this number using the example below.
This indicates the first 8 digits as follows: 1 1 0 0 1 0 0 0
This indicates the next 8 digits as follows: 0 0 1 1 0 0 0 1
2. Use a calculator with binary and decimal functions. Set the calculator to binary, “BIN”, and enter the 16 digits.
(1 1 0 0 1 0 0 0 0 0 1 1 0 0 0 1 in the example above.)
3. Press the decimal function, “DEC”, and multiply the displayed number by 10 to obtain the combustion cycles.
The combustion cycles in this example is 512,490.
50 82
18 42
1 25
SET ROOM
50 82
18 42
1 25
After the fault codes, the heater will display the
combustion hours, combustion cycles (number of
times the unit is turned on and off), and power
failure frequency.
RHFE-201FA,
RHFE-263FA,
RHFE-263FAII,
RHFE-1004FA,
RHFE-556FTRA,
RHFE-1004RFA,
RHFE-1004FTA
RHFE-201RFA,
RHFE-263RFA,
RHFE-433RFA,
RHFE-558RFA,
RHFE-202FTA,
RHFE-265FTA

Rinnai Direct Vent Service Manual 9
Analog
Indicator
Light
Digital
LED Name Definition Corrective Action
LO-HI PF --
:--
Power Failure Electric power has
been lost while the
appliance was running
Check that the power cord is firmly inserted into
the electrical outlet.
Check the 3 amp fuse.
Check whether the fuse or breaker has blown at
60 11 Missed Ignition Flame rod current
does not reach 1.0
microamp within a
certain time after the
solenoid opens.
Check that the flame rod is firmly positioned.
Check the flame rod lead.
Check the flame rod for carbon build up.
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that there are no leaks in the gas supply
line or appliance.
Check for air in the gas supply.
LO 12 Flame Failure Flame rod current
remains below 1.0
microamp for 3
seconds during initial
combustion
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that there are no leaks in the gas supply
line or appliance.
Check for air in the gas supply.
68 14 Overheat Safety
Device
High limit temperature
thermistor or thermal
fuse has activated
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that the flue terminal is not blocked.
Check that the air filter is not blocked.
Check that the warm air flow is not blocked.
(There should be a clearance of 40 inches in front
of the appliance.)
HI 16 Over
Temperature
Cut Off
Room temperature is
above 104ºF for
longer than 10
minutes
Check that the correct gas is being used.
Check the supply pressure at the meter and at
the appliance.
Check that the flue terminal is not blocked.
Check that the air filter is not blocked.
Check that the warm air flow is not blocked.
(There should be a clearance of 40 inches in front
of the appliance.)
72 76 31 Room
Temperature
Thermistor
Disconnection
Room temperature
thermistor circuit is
open
Check the circuit. (troubleshooting)
76 80 32 Room
temperature
thermistor short
circuit
Room temperature
thermistor wire is
trapped or touching
bare metal.
Check the circuit. (troubleshooting)
Fault Isolation Codes

10 Rinnai Direct Vent Service Manual
Analog
Indicator
Light
Digital
LED Name Definition Corrective Action
64 68 72 33 High-limit
thermistor
disconnection
High limit thermistor
circuit is open.
Check the circuit. (troubleshooting)
68 72 76 34 High-limit
thermistor short
circuit
High limit thermistor
wire is trapped or
touching bare metal.
Check the circuit. (troubleshooting)
LO 60 64 53 Abnormal spark
sensed
• Sparker is not off
within 20 seconds of
ignition.
• 1st spark is not
sensed within 2
seconds
• 2nd spark is not
continuous for 1
second after
solenoid valve
opens
Replace sparker
60 64 68 61 Abnormal
Combustion Fan
RPM
RPM is not achieved
within a certain time or
exceeds the RPM
limit.
Check for obstacle preventing fan from turning
freely.
Check wiring harness to motor for damage or
loose connections.
64 68 70 ON/OFF Switch
Failure
The ON/OFF switch
connects continuously
for more than 15
seconds.
Check the circuit. (troubleshooting)
Replace switch.
LO 60 71 Solenoid Valve
Failure
For either solenoid
valve, SV1 or SV2, the
signal and response
signal are different.
Check the circuit. (troubleshooting)
Replace gas valve.
80 72 Flame Rod
Failure
Flame rod output does
not cease within 20
seconds
Check the circuit. (troubleshooting)
Replace flame rod.
72 76 80
HI
73 Communication
Failure
Data transfer between
CPU and E2PROM
fails.
Disconnect the power and re-apply power.
NA 49 Pressure Sensor No signal from the
pressure sensor.
Check the circuit. (troubleshooting)
NA 99 Flue Block The pressure sensor
signal is below its limit.
Check the flue and termination for proper
installation and blockage.
60 64 68
72 76
NA Flue Block Flue blockage has
been detected based
on fan speed.
Check the flue and termination for proper
installation and blockage.
Fault Isolation Codes

Rinnai Direct Vent Service Manual 11
Heater does not operate. Is the heater plugged in?
Have the fuses or breaker blown at the fuse box / breaker panel?
Is there a power failure?
Is the air filter blocked?
Is anything blocking the outlet for the hot air?
Is the flue blocked?
AT IGNITION:
Warm air does not flow when the burner
lights.
The fan is started automatically after a short delay. This is to allow the
heat exchanger to warm up, helping to avoid cold draughts.
Smoke or strange smells are produced
on the first trial light up after installation.
This is caused by grease, oil, or dust on the heat exchanger and will stop
after a short time.
Sharp clicking noised at ignition, or
when unit shuts down, or goes out.
This is simply expansion noise from the heat exchanger.
DURING COMBUSTION:
Clunking noise when the thermostat
operates.
This is the sound of the solenoid gas valves opening and closing.
Unit is not heating room. Is the air filter blocked?
Is the set temperature high enough?
Is the warm air outlet blocked by anything?
Are the doors and windows of the room closed?
Was the appliance correctly sized for the space?
Air filter is blocked or the louvers are
blocked.
Allow heater to cool, clean air filter, and operate again.
Heater will not re-ignite after overheating Even after unit has cooled down, the heater does not ignite again. Repair
is necessary by a qualified service provider.
DURING COMBUSTION:
Convection fan continues to run after
turning OFF
This is to remove the residual heat from the heat exchanger. The fan will
stop when the heater cools down.
OTHER POINTS:
Steam is discharged from the flue
terminal.
High efficiency appliances tend to discharge water vapor on cold days.
This is normal.
Unit shuts off without apparent reason. Check whether filters are blocked. Dirty filters will cause the heater to
overheat.
Power Failure Switch OFF, then ON again when power is restored to re-set controls.
Fault Isolation - Other Issues

12 Rinnai Direct Vent Service Manual
RHFE-201FA
Troubleshooting
(AC IN) (Connector B)
Black-White 120 VAC CONNECTOR B Pin # 1-2
Black-Ground 120 VAC Pin #2-Ground
White-Ground 0 VAC Pin #1-Ground
(TR) Transformer: (Connector C) (AC Out)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Grey-Grey 90-110 VAC 3-6Pin #1-7
Red-Yellow 30-42 VAC 0.8-1.5Pin #4-5
Blank pin-Grey 15-21 VAC 0.6-1.2Pin #6-7
Grey-Black 180-220VAC 155-260Pin #7-8
(SP) Sparker: (Connector D) (Voltage potential while Sparking)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Red-Blue 85-100 VAC 100K-120K Pin #3-6
The spark must be sensed as being at the correct location and intensity before it will allow the gas valve to open. Check
across Pin # 1-2 at Connector F and you should read 4-6 VDC potential. When sparking, if the spark is in the right location and
intensity the voltage potential will drop to almost 0 (zero) and then return to the 4-6 VDC potential.
(SV1 and SV2) Main Solenoid Valves: (Connector D)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-Yellow 85-90 VDC 700-1000 Pin #1-4
*Resistance across each coils terminals should be 1400-2000 when isolated.
(POV) Modulating Gas Valve (Connector G)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Grey-Grey 6-16 VDC 80-90 Pin #2-6
(BL) Combustion Blower Motor: (Connector G) DC Motor 37VDC 8 Watts
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-White 7-12 VDC 8K-10K Pin #7-8
Yellow-White 4-5 VDC 4K-6K Pin #4-8
Red-White 10-30 VDC N/A Pin # 3-8
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 furnace.
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.

Rinnai Direct Vent Service Manual 13
RHFE-201FA
Troubleshooting
(FM) Convection Fan Motor: (Connector E) Variable 100VAC Motor 60 Hz
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-Red 37-105 VAC 100-120 Pin #1-2
* Be sure to check for obstructions to blades. Check the capacitor before replacing motor.
(PS) Pressure Sensor: (Connector A) Omron Electronic Pressure Switch
Omron Electronic 0.31 in (8.0 mm) WC
ON
0.11 in (2.8 mm) WC
OFF 5 VDC
Note: Insure clear and black hose from pressure switch to blower air chamber is not blocked or
crimped with any obstructions including spider webs.
(TF 216ºC, OHS1 90ºC, OHS2 70ºC) (Connector G) Safety Circuit:
Disconnect connector G from PCB. Check for continuity reading from Pin #1 to Pin #5 on the wiring
harness White to White wires. If you do not read continuity through this circuit, locate open thermal
fuse, bimetal OHS1, or bimetal OHS2, and replace. You must immediately determine what caused
the overheat situation and correct. Check combustion specifications, gas pressures, gas type, and
for any obstructions to air flow.
(R.TH) Room Thermistor: (Connector H) Negative Co-efficient Thermistor
(the resistance decreases as the temperature increases)
Disconnect connector H from PCB. Set your meter to the 200K scale. Place your meter leads into
Yellow to Yellow. Apply heat to the thermistor bulb. The resistance will decrease. Apply cold and the
resistance will increase. Examples of readings:
41ºF=91K50ºF=65K68ºF=39K86ºF=23K
(OH.TH) Over Heat Thermistor: (Connector H)
Disconnect connector H from PCB. Set your meter to the proper scale. Place your meter leads
into White to White. A reading below 0.38kindicates a short. A reading above 1255kindicates
an open circuit or broken wire. Insure air flow is not obstructed.
(FR) Flame Rod (Connector C1)
Set your meter to read micro-amps (µ). Disconnect connector C1 and place your meter in series
with the Yellow to Yellow wires. Upon flame development you should read 1 -2 micro-amps.
Depending on gas type and firing rate you should read 4 to 8 micro-amps. You must have a
grounded and polarized electrical supply with no obstructions in burner or build up on flame rod to
proof flame. The micro-amp symbol on your meter is µ.
(Hard Lock Out Information)
Improper sized gas lines, low pressure drops, defective or freezing pressure regulators, improper
electrical supply and failure to ground, spider webs in burners, intake and exhaust air blockage of
vents, broken or damaged wiring harnesses, or blown fuses can cause hard lock outs. Before
replacing components in furnace, insure the above items are within the specifications. The above
listed items are not a warranty issue or defect in unit.

14 Rinnai Direct Vent Service Manual
RHFE-201FA
RHFE-201RFA
Wire Diagram

Rinnai Direct Vent Service Manual 15
RHFE-201FA
RHFE-201RFA
Ladder Diagram

16 Rinnai Direct Vent Service Manual
RHFE-263FA
RHFE-263FAII
RHFE-263RFA
Troubleshooting
(AC IN)
Black-White 120 VAC Pin # 1-2
Black-Ground 120 VAC Pin #2-Ground
White-Ground 0 VAC Pin #1-Ground
(TR) Transformer: (Connector CN2 AC Out)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Gray - Gray 98-125 VAC 4--16 1-7
Black - Yellow 200-220 VAC 250--400 5-8
Black - Blue 12-20 VAC 1--3 8-9
White - White 98-125 VAC 4--14 2-3
Red - Red 35 VAC 1--3 4-10
(SP) Sparker: (Connector CN4)
Read voltage across: Voltage Potential Read resistance Pin Numbers
Red-Blue 85-100 VAC 100K-120K 3-6
The spark must be sensed as being at the correct location and intensity before it will allow the gas valve to open. Check
across Pin # 1-2 at Connector F and you should read 4-6 VDC potential. When sparking, if the spark is in the right location and
intensity the voltage potential will drop to almost 0 (zero) and then return to the 4-6 VDC potential.
(SV1, SV2, POV) Main Solenoid Valves: (Connector CN4)
Read voltage across: Voltage Potential Read resistance Pin Numbers
SV1 - Yellow ~ Black (hold) 85-90 VDC 1400-2000 1-4
SV2 - Yellow ~ Black (assist) 85-90 VDC 1400-2000 1-4
POV - Gray ~ Gray 6-16 VDC 80-90 2-6
*Resistance across each coils terminals should be 1400-2000 when isolated.
(BL) Combustion Fan Motor: (Connector CN8) DC Motor 37VDC 8 Watts
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-White 7-12 VDC 8-10 K7-8
Yellow-White 4-5 VDC 4-6 K4-8
Red-White 10-30 VDC N/A 3-8
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 furnace.
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.
WARNING

Rinnai Direct Vent Service Manual 17
Troubleshooting
(FM) Convection Fan Motor: (Connector CN3) AC Motor 60 Hz, 100VAC
Read voltage across: Voltage Potential Read resistance Pin Numbers
Black-Red 40-105 VAC 100-120 1-2
* Be sure to check for obstructions to blades. Check the capacitor before replacing motor.
(PS) Pressure Sensor: (Connector CN13) Electronic Pressure Switch, 125 V, 0.1 A
Electronic 0.31 in (8.0 mm) WC
ON
0.11 in (2.8 mm) WC
OFF 5 VDC
Note: Ensure clear and black hose from pressure switch to blower air chamber is not blocked or
crimped with any obstructions including spider webs.
(TH) Room Thermistor:
Check thermistor by inserting meter leads into each end of thermistor plug. Set your meter to the
200 Kscale. Apply heat to the thermistor bulb and the resistance should decrease. Apply cold
and the resistance should increase. Examples of readings:
41ºF=91K50ºF=65K68ºF=39K86ºF=23K
(FR) Flame Rod
Set your meter to read micro-amps (µ). Located on the combustion chamber, the lfame rod proofs
flame for proper operations. A properly grounded electrical supply is a must. Flame rod current
through this rod should range between 4 to 8 icro amps depending on gas type. Low fire flame
current should be 1.2 to 2.0 micro amps.
Improperly setup and /or converted units can soot and cause hard lockouts. If carbon is found on the
flame rod, clean the carbon from it. Then you need to confirm your manifold differential gas pressure on
Hi fire and Lo fire is correct. Insure primary and secondary air dampers are correct. Also, check to ensure
proper orifices were placed in the unit..
IMPORTANT INFORMATION CONCERNING HARD LOCKOUTS:
Other items that can cause hard lockouts are: improper sized gas lines, low gas pressures or pressure drops due
to other appliances on the gas system, spider webs in the burner and air intake of vent system, improper ground
or no ground at receptacle, supply regulators freezing up or defective, voltage drops or bad receptacles, winds in
excess of 40 mph causing turbulence inside the vent terminal, etc.
(OHS1, OHS2, TF) Safety Circuit Check: CN8
Check for continuity reading from pin #1 white wire to pin #5 white wire. If you do not read continuity through this
circuit, locate defective switch and replace that component. Then determine what caused overheat condition.
(MS) Main Switch: CN11
Disconnect CN11 from PCB, being careful not to break wires. Read Blue to Blue, pin #9 and 10 on 40K. When
ON/OFF is in the ON position, you should read 10--18K. When released, you should read open or 0 
Wiring harness, connectors, and fuses should be checked if all above readings are normal.
(RT) Room Temperature Control:
Integrated into the PCB program and works in conjunction with the thermistor as noted below.
RHFE-263FA
RHFE-263FAII
RHFE-263RFA

18 Rinnai Direct Vent Service Manual
RHFE-263FA
RHFE-263FAII
RHFE-263RFA
Wire Diagram

Rinnai Direct Vent Service Manual 19
Ladder Diagram RHFE-263FA
RHFE-263FAII
RHFE-263RFA

20 Rinnai Direct Vent Service Manual
RHFE-202FTA
RHFE-265FTA
Troubleshooting
Part Wire 202FTA 265FTA
Control Panel Red - Blue DC0-5V (Pulsed voltage); Resistance is infinity, but the current flows
when the switch is pushed.
Blue - Blue
OHS.
White - White
Below DC 1V, Below 2
Blue - White (OHS1)
Blue - White (OHS2)
TF White - White (TF)
O.H. TH
White - White 0.87-482k; (<0.87k:Short, >482k:Open)
Temperature 32°F (0°C):214k, 68°F (20°C):78k, 122°F (50°C):21k
176°F (80°C):7.3k, 212°F (100°C):3.6k, 135°F (275°C):1.5k
White - White
(Filter sign)
High Flashes below 4.5k
Low Flashes below 4.5k
White - White
(TH operates)
High Operates below 3.4k
Low Operates below 3.4k
Room
Thermistor
Yellow - Yellow 1.82-707k; (<1.82k:Short, >707k:Open)
Temperature 32°F (0°C):113k, 68°F (20°C):39k,
86°F (30°C):24k, 104°F (40°C):15k
FR Yellow - Yellow Below 0.1A （During Stop)
Combustion Fan
(In case of short
vent.)
White - Black Below ignition revolution +2Hz Below ignition revolution +2Hz
Ignition
revolution
Initial LP: 75Hz, NG: 80Hz LP: 80Hz, NG: 85Hz
Re-attempt LP: 75Hz, NG: 80Hz LP: 80Hz, NG: 85Hz
Normal
revolution
High LP: 110Hz, NG: 110Hz LP: 128Hz, NG: 118Hz
Low LP: 83Hz, NG: 83Hz LP: 82Hz, NG: 81Hz
Combustion Fan
(In case of long vent.)
White - Black - Below ignition revolution +2Hz
Ignition
revolution
Initial - LP: 80Hz, NG: 85Hz
Re-attempt - LP: 80Hz, NG: 85Hz
Normal
revolution
High - LP: 128Hz, NG: 128Hz
Low - LP: 82Hz, NG: 89Hz
Ignitor Red - Blue 90-120V
SV Black-White 80-100V, 1.5-2.5k
Black-Yellow
Modulating Valve Red-White DC2-15V（Low-High), 60-90
Convection Fan Red - Black 50-110V, 90-180
Pressure Sensor Red - White DC3 - 7V
Transformer 60Hz-120V
Gray - Gray AC108-132V, 5-20
White - White AC95-120V, 5-20
Red - Red AC20-40V, 0.5-2.0
Brown - Brown AC10-30V, 1-5
Black - Blue AC10-30V, 1.0-3.0
Black - Yellow AC200-240V, 200-450