TDS

PERFORMANCE DATA ELECTRICAL DIAGNOSTICS
DIAGNOSTIC CODES
#
DATA UNIT
01
Water Flow Rate x0.1 gal/min
02
Outgoing Temperature °F
03
Combuson Hours x100 Hours
04
Combuson Cycles See following informaon
05
Fan Frequency Hz
06
Addional Controllers Connected See following informaon
07
Water Flow Control Posion 0=Mid, 1=Open, 2=Closed
08
Inlet Temperature °F
09
Fan Current x10 mA
10
Total Bath Fill Amount gallons
11
HEX Outlet Temperature °F
12
By-Pass Flow Control Posion Degrees of opening
14
Intake Thermistor Temperature
(Indoor Units Only)
°F
17
Freeze Protecon Temperature
(Outdoor Units Only)
°F
19
Pump Hours x100 Hours
20
Pump Cycles See following informaon
DISPLAY CYCLE COUNT
000 to 999 x100 (0 to 99,900)
10– to 99- x10,000 (100,000 to 990,000)
1-- to 6-- x1,000,000 (1,000,000 to 6,000,000)
2. Use the (Up) and (Down) buon on the controller to select a seng number (See Parameter
Sengs Table).
NOTE: Wiring diagram is available in manual and on the inside front cover.
Important Safety Notes
There are a number of (live) tests required when performing electrical diagnoscs on this
product. Proceed with cauon at all mes to avoid contact with energized components inside the
water heater. Only trained and qualied service technicians should aempt to repair this product.
Before checking for resistance readings, disconnect the power source to the unit and isolate the
item from the circuit (unplug it).
Freeze Protecon
This unit has freeze protecon heaters mounted at dierent points to protect the water heater
from freezing. All of them should display a posive resistance reading.
Flame Rod
Place one lead of your meter to the ame rod and the others to ground. When the unit is
aempng to ignite, you should read more than 0.5 VAC.
Amp Fuses
This unit has two glass fuses located on the PC Board, one inline (10) amp and one (4) amp glass
fuse. Remove the fuses and check connuity through it. If you have connuity through each fuse
then it is funconing. Otherwise the fuse is blown and must be replaced. Note: RE140i/e does not
have a 4 amp fuse.
Thermistors
Check all thermistors by inserng meter leads into each end of the thermistor plug. Set your
meter to the 20 K scale and read resistance. Applying heat to the thermistor bulb should decrease
the resistance. Applying ice to the thermistor bulb should increase the resistance.
Below are examples of typical temperatures and resistance readings.
(* Value to be measured while unit is in operaon)
10
Air Supply or Exhaust Blockage
• Ensure approved venng materials are being used.
•
Check that nothing is blocking the ue inlet or exhaust.
•
Check all vent components for proper connecons.
•
Ensure vent length matches with the vent lengths set in the parameter sengs.
•
Verify High Altude seng is set properly. (See Parameter Seng)
• Check fan for blockage.
1 1
No Ignion (Heater Not Turning On)
•
Check that the gas is turned on at the water heater, meter, or propane cylinder.
•
If the system is propane, make sure that gas is in the tank.
•
Bleed all air from the gas line
•
Ensure appliance is properly grounded.
•
Ensure gas type and pressure is correct.
•
Ensure gas line, meter, and/or regulator is sized properly.
•
Verify parameter seng are set properly.
•
Ensure igniter is operaonal.
•
Check igniter wiring harness for damage.
•
Check gas solenoid valves for open circuits.
•
Ensure ame rod wire is connected.
•
Check ame rod for carbon build-up.
•
Remove burner cover and ensure burners are properly seated.
•
Remove burner plate; inspect burner surface for condensaon/debris.
• Check the ground wire for the PC board.
12
No Flame
•
Check that the gas is turned on at the water heater, meter, or cylinder.
•
Check for obstrucons in the ue outlet.
•
If the system is propane, make sure that gas is in the tank.
•
Ensure gas line, meter, and/or regulator is sized properly.
•
Ensure gas type and pressure is correct.
•
Bleed all air from gas lines.
•
Ensure proper venng material was installed.
•
Ensure condensaon collar was installed properly.
•
Ensure vent length is within limits.
•
Verify parameter seng are set properly.
•
Check power supply for loose connecons.
•
Check power supply for proper voltage and voltage drops.
•
Ensure ame rod wire is connected.
•
Check ame rod for carbon build-up.
•
Disconnect and reconnect all wiring harnesses on unit and PC board.
•
Check gas solenoid valves for open circuits.
• Remove burner plate; inspect burner surface for condensaon/debris.
14
Thermal Fuse
•
Check for restricons in air ow around unit and vent terminal.
•
Check gas type of unit and ensure it matches gas type being used.
•
Check for low water ow in a circulang system causing short-cycling.
•
Check for foreign materials in combuson chamber and exhaust piping.
•
Check heat exchanger for cracks or separaons.
•
Check heat exchanger surface for hot spots which may be caused by scale build-up.
Refer to instrucons in manual for ushing heat exchanger. Hard water must be
treated to prevent scale build up or damage to the heat exchanger.
•
Measure resistance of safety circuit.
•
Ensure high re and low re manifold pressure is correct.
• Check for improper gas conversion of product.
16
High Outgoing Temperature
•
Check for restricons in air ow around unit and vent terminal.
•
Check for low water ow in a circulang system causing short-cycling.
•
Check for foreign materials in combuson chamber and exhaust piping.
•
Check for blockage in the heat exchanger.
• Check the thermistor sensor and clean sensor of scale build-up.
19
Electrical Grounding
• Check all components for electrical short.
32
Outgoing Water Temperature Thermistor
• Check sensor wiring for damage.
• Measure resistance of sensor. (See Electrical Diagnoscs)
• Clean sensor of scale build-up.
• Replace sensor if necessary.
33
Heat Exchanger Thermistor
• Check sensor wiring for damage.
• Measure resistance of sensor. (See Electrical Diagnoscs)
• Replace sensor if necessary.
34
Combuson Air Temperature Thermistor Fault
•
Check for restricons in air ow around unit and vent terminal.
•
Check sensor wiring for damage.
•
Measure resistance of sensor.
•
Ensure fan blade is ght on motor sha and is in good condion.
• Replace sensor if necessary.
41
Freeze Protecon Thermistor
•
Check sensor wiring for damage.
•
Measure resistance of sensor. (See Electrical Diagnoscs)
• Replace sensor if necessary.
51
Inlet Water Temperature Thermistor
•
Check sensor wiring for damage.
•
Measure resistance of sensor. (See Electrical Diagnoscs)
• Replace sensor if necessary.
52
Modulang Solenoid Valve Signal
•
Check modulang gas solenoid valve wiring harness for loose or damaged terminals.
• Measure resistance of valve coil.
61
Combuson Fan
•
Ensure fan will turn freely.
•
Check wiring harness to motor for damaged and/or loose connecons.
• Measure resistance of motor winding.
63
Recirculaon Low Flow
•
Ensure the inlet water lter is clean and free of debris.
•
Ensure parameter seng are correctly set for recirculaon mode.
•
Ensure pump supply voltage.
•
Check the wiring harness to the pump and PCB for damaged and/or loose
connecons.
• Ensure air is removed from the recirculaon line.
65
Water Flow Servo
•
Measure the resistance values and voltage of the water ow control.*
•
Ensure the harness and connector are not wet.
• If the voltage from the PC Board is abnormal, replace the PC Board; otherwise,
replace the water ow servo valve.
66
Bypass Flow Servo
•
Measure the resistance values and voltage of the bypass servo valve.*
•
Ensure the harness and connector are not wet.
• If the voltage from the PC Board is abnormal, replace the PC Board; otherwise,
replace the bypass servo valve.
70
PC Board
•
Check the connecon harness at the connecon on the PC board.
• Replace PC board.
71
Solenoid Valve Circuit
•
Ensure dip switch on PC board is in the OFF posion.
•
Check gas solenoid valves for short circuits or grounding.
•
Ensure heater circuit is not grounded.
• Replace PC Board.
72
Flame Sensing Device
•
Verify ame rod is touching ame when unit res.
•
Check the ame rod and wire for damage.
•
Remove ame rod;check for carbon build-up; clean with sand paper.
•
Check inside burner chamber for any foreign material blocking ame at ame rod.
•
Check the resistance to the cabinet.
• If there is no issue with the ame rod or wiring, replace the PC Board.
79
Water Leak Detected
•
Turn o water supply and contact licensed professional.
LC
Scale Build-up in Heat Exchanger (when checking maintenance code history, “00” is
substuted for “LC”
•
LC indicates that there is scale build up in the heat exchanger and that the heat
exchanger needs to be ushed to prevent damage. Refer to the ushing instrucons
in the manual. Hard water must be treated to prevent scale build up or damage to
the heat exchanger.
•
Aer ushing, reset LC code as instructed.
•
Please call Rinnai technical department.
ss
(SS) Service Soon (Flush Heat Exchanger)
•
SS
is a me-based service indicator set during installaon. See secon “4.10
Congure Parameter Sengs” for addional details on seng and changing the
SS
indicator.
•
SS
indicates that it is me for service. The heat exchanger should be ushed to
prevent damage (refer to secon “6.2 Flushing the Heat Exchanger” for more
informaon). Hard water must be treated to prevent scale build-up or damage to
the heat exchanger.
•
To reset the
SS
code, push the On/O buon on the temperature controller 5 mes
in 5 seconds.
NO CODE - Nothing happens when water ow is acvated
•
Clean inlet water supply lter.
•
On new installaons ensure hot and cold water lines are not reversed.
•
Verify you have at least the minimum ow rate required to re unit.
•
Check for cold to hot cross over. Isolate circulang system if present. Turn o cold
water to the unit, open pressure relief valve; if water connues to ow, there is
bleed over in your plumbing.
•
Verify turbine spins freely.
•
Measure the resistance of the water ow control sensor.
•
If the display is blank and clicking is coming from the unit, disconnect the water
ow servo motor (GY, BR, O, W, P, BL, R). If the display comes on then replace the
water ow servo motor.
FF
Maintenance Indicator
A
B
PARAMETER SETTINGS
Performance Data Table
Electrical Circuit Table
Temperature Resistance Readings
59°F 11.4 - 14KΩ
86°F 6.4 - 7.8KΩ
113°F 3.6 - 4.5KΩ
140°F 2.2 - 2.7KΩ
221°F 0.6 - 0.8KΩ
1
2
CONTROLLER MODEL CONNECTED NOT CONNECTED
MC
__1 __0
BC
_1_ _0_
BSC & BSC2 1__, 2__ (QTY2)
0__
Default display is 100.
_ depends on connecon status of another controller.
06
Controllers Connected
04
Combuson Cycles
20
Pump Cycles
To Display Diagnosc Codes:
1. Turn o the water heater by pressing the “On/O” buon.
2. Press and hold the “On/O” for 2 seconds and then the (Up) buon simultaneously.
3. The last 9 maintenance codes display and ash one aer the other.
4. To exit diagnosc codes and return the water heater to normal operaon, press and hold the “On/O” buon for 2 seconds and then
the (Up) buon simultaneously.
5. Turn on the water heater by pressing the “On/O” buon.
1
2
1
3
FF
3
3
1
2
2
3
U356-0755-1X02(00)
100000733
Parameter Sengs Table
SETTING
#
SETTING
DESCRIPTION
SELECTION
A c
01
Maximum Set
Temperature
120°F 140°F
02
High Altude
(Installaon Locaon)
0 - 2,000 
(0 - 610 m)
2,001 - 5,400 
(610 - 1,646 m)
5,401 - 7,700 
(1,646 - 2,347 m)
7,701 - 10,200 
(2,347 - 3,109 m)
03
Service Soon
Disabled 0.5 Year 1 Year 2 Years
04
Recirculaon Sengs No Recirculaon
Recirculaon
(Dedicated)
05
Recirculaon Mode Economy Comfort
06
Control Switch
BMS
Air Handler (AH)
07
Units in Standby
2 1
10
Gas Type
(Factory Set)
LPG NG
12
Water Heater Model
(Factory set values and
not adjustable)
Without Pump With Pump
13
199/160 180/140
14
Indoor Outdoor
15
Low Acvaon Mode
On O
18
Seng Temperature
Table
Default Alternate
19
Adjust DHW
Temperature Seng
0°F (0°C) 1.8°F (1°C) 3.6°F (2°C) 5.4°F (3°C)
99
Vent Length
Long Short
Visit www.rinnai-lms.com for addional troubleshoong resources
2
Rinnai America Corporaon connually updates materials, and as such, content is subject to change without noce. For further informaon, contact Rinnai at 1-800-621-9419 or visit www.rinnai.us
To Obtain Performance Data:
1. Press and hold the (Down) buon.
2. While holding the (Down) buon for 2 seconds, press and hold the “On/O”
buon (hold both buons simultaneously).
3. Use the (Up) and (Down) buons to scroll to the desired performance
informaon described below.
01A
01
To Adjust the Parameters:
1. Press the “A” buon for 1 second.
3. Once the desired seng number is selected, use the “On/O” buon on the
controller to change the selecon for the seng number.
Example: Display will change from 01A to 01b for Maximum Temperature seng
(as shown below).
4. To exit the parameters, press the “A” buon on the PC board for 1 second.
MANIFOLD PRESSURE SETTINGS
Ensure gas pressure check under Commissioning has been completed rst! The regulator is
electronically controlled and factory pre-set. Under normal circumstances it does not require
adjustment during installaon. Make adjustments only if the unit is not operang correctly and
all other possible causes for incorrect operaon have been eliminated.
1. Turn o the gas supply.
2. Turn o the 120 V power supply.
3. Remove the front panel from the appliance.
4. Turn on the 120 V power supply.
5. Check the gas type using the data plate on the side of the unit and parameter seng 10
(refer to Parameter Sengs secon). (A=LPG, b=NG).
6. Remove test port screw and aach the manometer to the burner test point, located on
the manifold.
7. Turn on the gas supply.
8. Flow water through the water heater at the maximum ow rate obtainable. (At least 3
gallons per minute is recommended. If there is not enough water owing, the water
heater could shut o or sustain damage due to overheang.)
9. Push and hold “B” buon. “IF” will appear on the display.
10. Push and hold “A” buon. “Forced Low” will appear on the display.
11. Push and hold “A” buon again. “Forced High” will appear on the display.
12. While in “Forced Low” or “Forced High”, use the Up buon on the controller to increase
the pressure. Use the Down buon to decrease the pressure.
13. To exit “Forced Low” or “Forced High”, push and hold “B” buon. “2L” will appear on the
display.
14. Push and hold “B” buon again. “3C” will appear on the display. (Indoor models only).
15. Push and hold “B” buon again. “4t” will appear on the display.
16. Push and hold “B” buon again. The set temperature will appear on the display (indoor
models only).
17. Close hot water taps.
18. Turn o the gas supply and 120 V power supply.
19. Remove the manometer and re-install the sealing screw.
20. Turn on the gas supply and 120 V power supply.
21. Operate the unit and check for gas leaks.
22. Install the front panel.
Note: For addional installaon and commissioning informaon, refer to the Installaon and Operaon
Manual.
This appliance must be installed, serviced and removed by a trained and
qualied person. During pressure tesng of the consumer piping, ensure gas
valve is turned o before unit is shut o. Failure to do so may result in serious
injury to yourself or damage to the unit.
WARNING
Commissioning
With all gas appliances in operaon at maximum gas rate, the following inlet gas pressure at the incom-
ing test point on the Rinnai water heater should read 4 in. wc - 10.5 in. wc on natural gas and 8 in. wc -
13.0 in. wc on propane gas. If the pressure is lower, the gas supply is inadequate and the unit will not
operate to specicaon. Check the gas meter regulator and pipework for correct operaon/sizing and
correct as required.
Model
#
Vent
Length
Maximum
Water
Pressure
Gas Supply Pressure
Min./Max.
(FL) Forced Low (FH) Forced High
NG LPG NG LPG
NG LPG inH2O(wc) inH2O(wc) inH2O(wc) inH2O(wc)
RE199i
Short
150 PSI 4.0/10.5 8.0/13.0
0.72 0.98 2.56 4.24
Long 0.71 1.00 2.39 3.92
RE180i
Short 0.72 0.98 2.56 4.24
Long 0.71 1.00 2.39 3.92
RE160i
Short 0.73 0.96 2.49 4.31
Long 0.74 0.96 2.55 4.48
RE140i
Short 0.73 0.96 2.49 4.31
Long 0.74 0.96 2.55 4.48
COMPONENT WIRE COLOUR VOLTAGE RESISTANCE
PCB
Connector PIN
Power Supply Black-White
AC108～132V
N/A CN100 1-3
Flame Rod
Yellow-Body more than 0.5VAC N/A CN9 37
Pink-Body more than 0.5VAC N/A CN7 1
Spark Electrode White-Black
11～14VDC*
N/A CN9 5-8
Combuson Fan
Red-Black
7～48VDC*
N/A CN9 1-3
White-Black
2～14VDC*
N/A CN9 2-3
Yellow-Black
11～14VDC
N/A CN9 4-3
Water Flow
Control Device
Red-Pink
N/A
40～60Ω
CN9 21-19
Blue-White CN9 25-23
Orange-Grey
11～14VDC
N/A CN9 6-13
Brown-Grey
limier On：less than 1VDC
limier O：4～6VDC
N/A CN9 17-13
By-Pass Flow
Control Device
(2737, 2432 mod-
el only)
Red-Pink
N/A
40～60Ω
CN9 29-27
Blue-White CN9 33-31
Main Solenoid
Valve
Black-Black
8～13.5VDC 15～25Ω
CN9 18-32
Modulang
Solenoid Valve
Yellow-Yellow
2～17VDC* 10～20Ω
CN9 12-14
Solenoid Valve 1 Blue-Black
8～13.5VDC 20～30Ω
CN9 24-22
Solenoid Valve 2 Yellow-Black
8～13.5VDC 20～30Ω
CN9 26-22
Solenoid Valve 3 Red-Black
8～13.5VDC 20～30Ω
CN9 28-22
Solenoid Valve 4
(2737, 2432, 2730
model only)
Orange-Black
8～13.5VDC 20～30Ω
CN9 30-22
Outgoing Water
Thermistor
White-White
N/A
59°F：11.4-14kΩ
86°F：6.4-7.8kΩ
113°F：3.6-4.5kΩ
140°F：2.2-2.7kΩ
221°F：0.6-0.8kΩ
Disconnect the con-
nector and measure
at thermistor side.
CN7 11-13
White-White CN7 4-5
Inlet
Thermistor
White-White CN7 9-6
Heat Exchanger
Thermistor
White-White CN7 8-4
Intake
Thermistor
(Indoor type only)
White-White CN7 12-6
Freeze
Protecon
Thermistor
(Outdoor type
only)
White-White
32°F：38k-43k
50°F：22k-26k
CN7 10-6
Overheat Switch Black-Black less than 1VDC less than 1Ω CN9 10-16
Water Flow
Sensor
Red-Black
11～14VDC
N/A
CN9 7-11
Yellow-Black
4～7VDC*
Comment：more than 6Hz
(1.0L/min)
CN9 9-11
Integrated Pump
(Integrated Pump
type only)
White-Black
AC108～132V
N/A C101 1-2
Red-Brown
11～14VDC*
N/A CN8 1-2
External Pump
(Except for inte-
grated pump and
1720 model)
White-Black
AC108～132V*
N/A C101 1-2
Addional
Controller(s)
White-White
11～14VDC
N/A CN4 1-3
Thermal Fuse White-White
less than 1VDC less than 1Ω CN9 20-34
•
Placeholder in Diagnosc code history indi-
cang that a service provider performed
maintenance or service.
•
Enter this code aer performing service by
pressing

(Up) ,

(Down) and On/O
simultaneously.
•
FF
is visible on the monitor.
*See “Electrical Diagnoscs”
(I)