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Electrolux EN18WI30LS Service Manual Download Page 15

NO

Flow is adjusted

 than setting

(1

μ

A or more)

Flame rod circuit abnormality

Outlet thermistor

open or shorted

Inlet thermistor

YES

Fan speed

YES

NO

normal

Initial check

YES

Hot water fixture opened

Igniter sparks

Connect power

*1

Fix problem

Fan motor stops

Turn power Off

Disconnect power

(target ± 200 rpm)

(After 60 sec)

open or shorted

BURNER ON Lamp

YES

NO

NO

YES

Heat exchanger flow

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

YES

1

4

5

10

1

13

15

16

17

14

9

1

6

11

5

6

9

goes off

 closes

Gas solenoid Valve 3

Gas solenoid valve 2

opens

Primary gas solenoid

valve opens

Fan motor ON

BURNER ON lamp

lights

Gas solenoid valve 1

opens or closes

Primary gas solenoid

valve closes

Gas solenoid valve 1

closes

Gas proportioning valve

closes

BURNER ON lamp

goes off

closes

Gas solenoid valve 2

 closes

Primary gas solenoid

valve closes

Gas solenoid valve 1

closes

(0.5

μ

A or less)

not detect a flame

Flame rod does

is too high

Outlet water temp.

Abnormal gas solenoid

valve drive circuit

20

YES

NO (3rd)

NO

YES

YES

NO

NO

YES

YES

NO

YES

NO

YES

NO

Bypass flow control

valve closes

7

abnormality

Circuit board

YES

NO

Gas solenoid valve 1

14

Gas solenoid valve 2

closes

closes

Gas solenoid valve 3

opens

control valve activates

*3 When the present fan speed is 500rpm more or less than target speed.

(as necessary) *2

2

3

2

3

Condensate drain trap Blockage

22

and heat exchanger flow

Bypass flow control valve

control valve move to

initial position setting

Lightning safety

device normal

ON/OFF button turn ON

Water heating

Set. Temp. indicates on the display

Bypass and H.E. flow control valves open

Self-diagnosis

Normal combustion

possible

5 years or more

of use

Maximum output limited

Warning indication

Warning indication

Warning indication

The unit will continue to operate with the error
code blinking on the remote controller.

Display turns OFF

Error code stops flashing

Self-diagnosis

Normal combustion

possible

Self-diagnosis

Normal combustion

possible

Warning indication

Warning indication

Overheat prevention

device (Thermal fuse) normal

(less than 430°F)

Heat exchanger

flow control valve

normal

Bypass

flow control valve

normal

Setting 125°F or higher

Water flow sensor detects

> 0.5 GPM

Inlet water high

temperature check

normal

Heat exchanger thermistor
open or shorted

8

Exhaust thermistor
open or shorted

Gas proportioning valve

opens

Flame rod

detects

1

μ

A

1st, 4th, 7th: after 5 sec.
others: after 2 sec.

Igniter stops sparking

Igniter stops sparking

15

Gas solenoid valve 2

opens or closes

(as necessary) *2

18

Gas solenoid valve 3

opens or closes

(as necessary) *2

19

Gas solenoid valve 4

opens or closes

(as necessary) *2

 outlet water temp. less

At max. BTU is

Safety device

triggered

 closes

Gas solenoid Valve 4

Gas proportioning valve

closes

Gas solenoid valve 4

Re-ignition

(8 times or less)

Extinction

(5 times or less)

High limit switch

is normal

triggered(430°F or more)

device (Thermal fuse)

Overheat prevention

Fan speed

open or shorted

Inlet thermistor

open or shorted

Outlet thermistor

5

6

11

Heat exchanger

open or shorted

7

thermistor

abnormality

*3

22

Condensate drain trap
abnormality (check for

blockage and

electrode connections)

open or shorted

Exhaust thermistor

8

<-DV model only>

<-DV model only>

Abnormal

combustion

Exhaust temperature

is too high

Using terms is

equivalent to

more than 10 years

Gas solenoid

valve 1

Over

127,000

BTU

ON

Gas solenoid

valve 2

Gas solenoid

valve 3

Gas solenoid

valve 4

ON

ON

ON

Over

76,200

BTU

ON

ON

Over

44,400

BTU

ON

ON

ON

Over

31,750

BTU

ON

ON

Over

19,000

BTU

ON

Over

16,000

BTU

ON

*2

*1 If the inlet temp. is less than 122°F

or if the following statements
about K are true,
the inlet temperature
will be normal (YES)

K >

Approx. 29.7

+ water inlet temperature (°F)

Total water flow (GPM)

Set temperature

K

Less than 125°F

136°F

125°F or more

Set temp. + 9°F

Primary gas solenoid

valve closes

closes

closes

 closes

BURNER ON lamp

Gas solenoid valve 2

Gas solenoid valve 3

goes off

Gas solenoid valve 1

closes

YES

NO

Fan motor post purge

Heat exchanger flow

control valve opens fully

Fan motor stops

YES

NO

NO

valve closes

Bypass flow control

Hot water fixture closed

Shutdown procedure

Hot water fixture closed

Water flow

< 0.4 GPM

sensor detects

Gas proportioning valve

Gas solenoid valve 4

closes

Has 6min.

passed since hot water

fixture closed

Heat

exchanger thermistor

< 104°F

●

EN19WI30LS / EP19WI30LS

15

Summary of Contents for EN18WI30LS

Page 1: ...afety Information 2 1 Features 3 2 Specifications Performance Table 4 3 Dimensions 6 4 Components 7 5 Operating Principle 10 6 Operation Flow Chart 13 7 Wiring Diagram 17 8 Troubleshooting 19 Error Codes and Checkpoints 19 Circuit board checkpoints 21 Error Descriptions and How to Reset 23 Remote Controller 30 Displaying Maintenance Monitors 30 Maintenance Monitor List 31 Circuit Board Replacement ...

Page 2: ...t short circuit any safety device on this appliance If a safety device is not functioning properly replace the part Do not under any cir cumstances short circuit the part Exhaust and gas leakage caution Warning Always check for leaks when installing or modifying the exhaust vent or gas piping 2 Post Service Checks Check parts for leaks Caution service performed could have caused them If the unit i...

Page 3: ...onnect Multi System only one remote controller will be installed 3 Temperature Lockout Function The remote controller can be set to restrict the maximum allowable temperature setting for added safety See Changing Default Temperature Setting section for details 4 Elevation Adjustment The water heater can be quickly configured for installations above 2000 by simply adjusting dip switches inside of th...

Page 4: ...pply Exhaust Connection Sizes Power Supply Materials Water Inlet Hot Water Outlet Gas Inlet Condensate Drain Safety Devices Casing Flue Collar Primary Heat Exchanger Secondary Heat Exchanger Supply Consumption Power Vented EN18WI30LS EP18WI30LS EN19WI30LS EP19WI30LS Installation Indoor Wall Mounted Air Supply Exhaust Connection Sizes Water Inlet Hot Water Outlet Gas Inlet Power Supply Supply 81W 8...

Page 5: ... 120 130 140 150 160 170 180 Flow Rate GPM 80 0 1 2 3 4 5 6 7 8 9 10 90 100 110 120 130 140 150 160 170 180 Flow Rate GPM 80 0 1 2 3 4 5 6 7 8 9 10 90 100 110 120 130 140 150 160 170 180 Set temperature F Flow Rate GPM EN18WI30LS EP18WI30LS 9 10 11 12 Set temperature F 80 0 1 2 3 4 5 6 7 8 90 100 110 120 130 140 150 160 170 180 190 Flow Rate GPM Spring Fall Inlet water temp 64 F 9 10 11 12 Set tem...

Page 6: ...mm 4 Ø0 5 13mm 6 0 24 x 0 4 6mm x 10mm OBLONG HOLE 0 4 10mm VIEW FROM TOP EN18WI30LS EP18WI30LS 3 Dimensions EN19WI30LS EP19WI30LS WATER DRAIN VALVE COLD WATER INLET WATER DRAIN VALVE HOT WATER OUTLET WATER DRAIN VALVE CONDENSATE DRAIN WIRING THOROUGHWAY GAS INLET WATER FILTER WATER DRAIN VALVE WIRING THOROUGHWA AC120V AIR INLET FLUE COLLAR 6 7 170mm 5 5 140mm 3 9 100mm 2 8 70mm 1 4 36mm 0 4 10mm ...

Page 7: ... Exchanger Thermistor Manifold Water Flow Sensor Freeze Prevention Heater 2 Freeze Prevention Heater 3 Freeze Prevention Heater Q High Limit Switch Burner Thermal fuse Igniter Primary Heat Exchanger Secondary Heat Exchanger AIR INLET FLUE COLLAR Hot Water Outlet Gas Inlet Water Inlet Water Drain Valve Water Drain Valve EN18WI30LS EP18WI30LS 7 ...

Page 8: ...EN19WI30LS EP19WI30LS 8 ...

Page 9: ...surface Temperature Setting Ex 110 F Flow Meter Setting The display will flash after hitting the flow meter alarm set button Error Code When this indicator is lit the hot water temperature can be set A number will flash if a failure occurs Priority Indicator Burner On Indicator When burning the indicator is lit Note As shipped from the factory the remote controller is set to display in F and gallons ...

Page 10: ...sor Water Flow Inlet Thermistor Exhaust Thermistor Anti Frost Heater Primary Heat Exchanger Secondary Heat Exchanger Exhaust Thermal Fuse Igniter Ignition Electrode Flame Rod Burner Gas Solenoid Valve Switch Gas Solenoid Valve 1 Switch Gas Solenoid Valve 2 Primary Gas Valve Filter Gas Proportioning Valve High Limit Switch Water Drain trap Pressure Relief Device Water Drain Valve Anti Frost Heater ...

Page 11: ...hermistor Cold Water Supply Condensate Drain Valve Exhaust Thermistor DV Model Only Exhaust Anti Frost Heater Secondary Heat Exchanger High Limit Switch Primary Heat Exchanger Thermal Fuse Igniter Ignition Electrode Flame Rod Burner Water Level Electrode Drain trap Air Supply Fan Motor Rotation Frequency Sensor Primary Gas Valve Filter Gas Proportioning Valve Gas Solenoid Valve 1 Gas Solenoid Valv...

Page 12: ...e flow sensor detects that the flow rate has dropped below the minimum rate for continued burning the gas valves will close and the burner flame will go out After the post purge removes residual gas from the combustion chamber the unit stops If necessary turn off the power by pressing the Operation Button on the remote controller the priority lamp will turn off 2 Error Codes If the flame rod does not ...

Page 13: ...es off closes Gas solenoid valve 2 closes Primary gas solenoid valve closes Gas solenoid valve 1 closes 0 5A or less not detect a flame Flame rod does is too high Outlet water temp Abnormal gas solenoid valve drive circuit 18 High limit switch is normal YES NO 3rd Main flow control valve moves to initial position setting Lightning safety device normal NO YES of use YES 10 years or more NO Maximum ...

Page 14: ...low sensor detects 0 4 GPM Heat YES Has 20 or 50 NO 4 min passed Heaters turn off 4 YES NO Has 15 or 5 min passed 41F or higher Air inlet thermistor NO YES Anti frost heater operation flow When less than 60 minutes after combustion it is 50 F or higher Differs depending on set temperature 4 5 30 17 indication Warning exchanger thermistor 37 F or higher Heat 35 Heaters turn on Heaters turn off 50 m...

Page 15: ...ger flow control valve normal Bypass flow control valve normal Setting 125 F or higher Water flow sensor detects 0 5 GPM Inlet water high temperature check normal Heat exchanger thermistor open or shorted 8 Exhaust thermistor open or shorted Gas proportioning valve opens Flame rod detects 1μA 1st 4th 7th after 5 sec others after 2 sec Igniter stops sparking Igniter stops sparking 15 Gas solenoid v...

Page 16: ... X 41 F and Y 14 F NO NO YES X 41 F and Y 14 F Fan motor operation flow Exhaust thermistor 18 Fan Turn ON 1 200 rpm 3 minutes Fan speed 1 200 500rpm 61 Exhaust thermistor 32 Fan Turn OFF No error code 61 Exhaust thermistor 46 Fan Turn OFF YES NO YES NO YES NO YES NO YES NO YES NO Heat exchanger thermistor 68 NO YES Fan motor operation flow SV conversion Exhaust thermistor 32 Fan Turn ON 2 000 rpm ...

Page 17: ...ROUND G GROUND DIP SWICHI FLAME DETECTING CIRCUIT GAS PROPORTION VALVE POWER CONTROL CIRCUIT WATER FLOW SENSOR 15V POWER CIRCUIT FLOW CONTROL VALVE DC15V GND DC140V HOT HEAT EXCHANGER THERMISTOR 5V POWER CIRCUIT AIR INLET THERMISTOR FLAME ROD FR DU EARTH RELAY 2 D GND WATER OUTLET THERMISTOR WATER INLET THERMISTOR FAN PULSE CONTROL CIRCUIT RELAY DRIVING CIRCUIT RELAY 1 CPU CENTRAL PROCESSING UNIT ...

Page 18: ... EXCHANGER FLOW CONTROL VALVE DC15V GND DC140V HOT HEAT EXCHANGER THERMISTOR 5V POWER CIRCUIT AIR INLET THERMISTOR FLAME ROD FR DU EARTH RELAY 2 D GND WATER OUTLET THERMISTOR WATER INLET THERMISTOR FAN PULSE CONTROL CIRCUIT RELAY DRIVING CIRCUIT RELAY 1 CPU CENTRAL PROCESSING UNIT D FAN CURRENT VALUE INPUT POWER CONTROLLER DC12V C SECONDARY PRIMARY COMBUTION FAN FAN FAN CONTROL OUTPUT FAN ROTATION...

Page 19: ...eck flame rod Check ground paying special attention to the ground connection to the circuit board Check for accidental extinction of the flame Check for abnormal combustion Check gas solenoid valves Check flame rod Check ground especially on circuit board Check for melting or damage to the thermal fuse Check for improper connection of thermal fuse Check if high limit switch is triggered Check for ...

Page 20: ...connection of the fan Check voltage from circuit board F 65 Heat exchanger flow control valve abnormality Check that the main flow control valve is functioning 2 Check for improper connection of the valve To reset this error code the power needs to be disconnected and then reconnected F 66 Bypass flow control valve abnormality Check that the Bypass control valve is functioning 3 Check for improper...

Page 21: ...or Flame Rod CN27 1 4 CN78 1 1 CN101 7 50 80 Ω 19 31 Ω 36 58 Ω Coil resistance DC 0 7 4 4 V 2 CN63 W W 7 CN63 2 CN63 6 CN92 3 DC 14 16 V AC 108 132 V CN10 6 DC 14 16 V Note 2 Note 3 Coil resistance 2 100 Hz 400 Hz CN27 6 CN10 CN10 6 CN10 CN102 6 3 DC 14 16 V 36 58 Ω 36 58 Ω DC 14 16 V DC 0 3 15 V DC 14 16 V DC 16 14 V CN27 2 2 Flame Rod GND DC 10 14 V DC 7 45 V DC 0 45μA or less 10 kHz 100 kHz Coi...

Page 22: ...W 2 CN63 DC 0 7 4 4 V Note 3 22 Water Level Electrode CN38 31 W BL 17 CN38 DC 14 16 V Power Supply Power Circuit Board CN92 1 W BK 3 CN92 AC 108 132 V Power Supply Main Circuit Board C102 4 R BL 3 C102 DC 14 16 V Remote Controller CN89 1 BL BL 3 CN89 DC 14 16 V 2 6 6 6 Fan Motor CN27 CN38 4 9 14 Ref No Part CN Pin No Circuit board Check points CN Pin No CN27 Water Flow Sensor CN78 Flame Rod CN38 B...

Page 23: ...102 CN 102 CN 89 Pin No Color Code Pin No Code Color Pin No Code Color How to Fix Problem and Reset Unit How to Fix Problem and Reset Unit How to Fix Problem and Reset Unit A blinking 10 indicates there has been a loss of gas input but combustion will continue In order to reset the unit the power must be disconnected and then reconnected If the overheat prevention device Thermal fuse has fused it ...

Page 24: ...between flame rod and circuit board check for a ground fault in the unit especially the circuit board ground Check for damage or improper connection of the ground wire between the circuit board and the metal case of the unit Current value changes depending on the load Proportioning value resistance 50 Ω 90Ω How to Fix Problem and Reset Unit Visually confirm that a flame ignites check wiring connec...

Page 25: ...ion When valve is fully open Check for short or open circuit or improper connection of wiring to valve No Indication Error Code Possible Causes Checkpoint Error Code Possible Causes Checkpoint How to Fix Problem and Reset Unit How to Fix Problem and Reset Unit Confirm the measured fan speed by Maintenance Monitor No 10 If the fan motor does not rotate but voltage is normal then the fan motor shoul...

Page 26: ...heat exchanger etc and then replace the overheat prevention device Thermal fuse Check remote controller and circuit board Check connection of remote control cord and cord to circuit board CN89 1 BL BL 3 CN89 DC14 16V If there is a voltage abnormality replace the circuit board Check remote control cord for a short or open circuit or for a ground fault Closed circuit not open or shorted If an open o...

Page 27: ...stic list Check for open or short circuit or for an improper connection 70 Circuit board Abnormality Detection of circuit board abnormality Disconnect the electrical power then reconnect electrical power to the water heater to reset the system If the circuit board abnormality is continuous replace the circuit board 71 Gas Solenoid Valve Drive Circuit Abnormality Check for damage to the gas solenoi...

Page 28: ...mistor Abnormality Check the resistance through the thermistor Check for open or short circuit or improper connection CN63 7 W W 2 CN63 Compare to temperature characteristic list Check for open or short circuit or for an improper connection Check the resistance through the thermistor Check for abnormal combustion Check flue for blockage or obstruction Refer to Manifold Pressure Adjustment Procedur...

Page 29: ... 140 F and over fo r 4 seconds with the set temp 122 F and less The unit will shut off and a 16 error code will flash Check gas proportioning valve CN101 7 R BL 6 CN101 DC 0 3 15 V Check for short or open circuit or improper connection of wiring to valve CN38 How to Fix Problem and Reset Unit 16 Abnormally High Output temperature is too hot CN38 65 66 Heat Exchanger Flow Control Valve Abnormality ...

Page 30: ... and hold both the up and down setting buttons simultaneously for more than two seconds This can be done regardless of whether the power has been turned on or the unit is operating Indications 1 The maintenance monitor data no will appear on the display for two seconds and then the data will appear 2 In order to switch to other maintenance monitor data press either the up or down button once The d...

Page 31: ...iplier X Display Reading Data 1 F 0 5 0 5 1 F 0 5 1 10 mA 1 mA 1 100 110 100 110 OFF 000 ON 001 1 1 X 1 X 1 0 X 1 0 X 1 X 1 0 X 1 X 0 1 X 1 X 1 X 1 X 1 31 39 38 36 Detection Temperature Water Inlet Thermistor Detection Temperature Water Outlet Thermistor Detection Temperature Heat Exchanger Thermistor Detection Temperature Air Inlet Thermistor Fan Motor Current Value X 1 X 1 1 xy 2 xy 3 xy 91 Init...

Page 32: ...ller connection from connection number CN89 2 Using the supplied transfer cable connect the new and old boards by inserting the cable in connection number CN89 of each board 3 Reconnect the electrical power The data transfer will be completed in about 30 seconds The unit will signal a successful transfer by rotating the fan and opening and closing the gas solenoid valve 4 After confirming a succes...

Page 33: ... writer number until 11 1 appears on the display 4 Press the UP button for 5 sec to change the setting number from 1 to 2 11 2 appears on the display 5 Set the POWER button to ON or let the unit sit for 30 seconds Note 1 Disconnect electrical power after setting the POWER button off on the remote controller The water heater will automatically turn on when electrical power is reconnected if this st...

Page 34: ...s supply pressure to the unit a tap is provided on the gas inlet Remove the hex head philips screw from the tap and connect a manometer using a silicon tube In order to check the gas manifold pressure a pair of taps are provided on the gas valve inside the unit The pressure can be checked either by removing the hex head philips screw and connecting a manometer with a silicon tube or by removing th...

Page 35: ...5 112 213 440 675 1260 Maximum Capacity of Flex TracPipe in Cubic Feet per Hour of Natural Gas 0 60 Specific Gravity 0 5 WC Pressure Drop Length in Feet Pipe Size 3 4 1 1 1 4 1 1 2 2 206 383 614 1261 2934 147 269 418 888 2078 121 218 334 723 1698 105 188 284 625 1472 94 168 251 559 1317 86 153 227 509 1203 80 141 209 471 1114 75 132 194 440 1042 71 125 181 415 983 67 118 171 393 933 55 94 137 320 ...

Page 36: ...ust to the correct pressure Repeat steps 1 and 2 until both are at the correct pressure 3 2 1 Note 2 Note 1 Manifold Gas Pressure Pressure Set Button Maximum Manifold Pressure Set Button Minimum Manifold Decrease Button Manifold Gas Pressure Increase Button Model Name Gas type NG LPG EN18WI30LS 7 9 11 0 2 95 3 60 1 10 1 35 Supply Pressure inch H2O Manifold Pressure inch H2O Cover off Max value Min...

Page 37: ...ns or scalding turn off the power button and wait until the equipment cools before performing maintenance CAUTION Check For laundry newspaper timber oil spray cans and other combustible materials near the heater or the exhaust vent terminal For abnormal sounds during operation For abnormalities in external appearance discoloration or flaws For water leaks from the equipment and piping For dust and ...

Page 38: ...water fixtures 3 With a bucket ready remove the inlet and outlet drain plugs about 0 4 gallon 1 4L will drain out 4 Take the water drain valve with water filter out of the inlet See illustration to right 5 Clean the water drain valve with water filter with a brush under running water 6 Replace the water drain valve with water filter and close the drain plugs Take care not to lose the packing 7 Close a...

Page 39: ... water to 1 part Lime Away or CLR into a bucket 8 Place both the pump inlet hose and the drain outlet hose into the pail 9 Open both drain valve lever handles on the isolation valves 10 Turn the pump on The unit will attempt to ignite make sure that the gas has been turned off and a number 11 should flash on the remote controller after about 1 minute Do not reset the unit Allow the solution to circ...

Page 40: ... gas water heater can be programmed so that it will default to one of three temperatures if the remote controller is removed 140 130 120 F 60 55 50 C To change the default tempera ture adjust the dip switches as described below The default temperature is 120 F 50 C 1 Disconnect electrical power to the water heater 2 Remove the front cover of the water heater 4 screws 3 Disconnect the remote contro...

Page 41: ...eral it is not advisable to run water through the unit when it is OFF p 6 but in this case freeze prevention is more important Remember to set mixing valves and fixtures to their original levels before using the unit again to prevent scalding If there is still a risk that the unit will freeze drain the unit as shown on the next page Freezing is prevented within the device automatically by the freez...

Page 42: ... off the power supply 4 Close the water supply valve 5 Fully open all hot water fixtures 6 Turn the drain plug to the left to open and then remove 7 Check that the water is completely drained close all the drain plugs and the hot water fixtures after 10 minutes or more pass from operation of 6 Drain water into a bucket to prevent water damage Fixture Do not touch with wet hands Drain Plugs Each drai...

Page 43: ...t will not be exposed to steam ammonia sulfur chlorine ethylene compounds or acids 2 If this unit will be installed in a restaurant locate it so that it will not be effected by steam 3 Avoid any installation that will expose the unit to steam or moisture For Multiple Floor Water Supply 1 If the unit will be installed on the lower floor of a multiple story building in order to get the maximum flow ra...

Page 44: ...Filling the condensate trap before vent pipe installation DANGER Prior to initial start up make sure that you fill the condensate trap with water This is to prevent dangerous exhaust gases from entering the building Failure to fill the condensate trap could result in severe personal injury or death Please follow one of the procedures described below to ensure that the condensate trap is filled with w...

Page 45: ...here the nearest drain is above the water heater will require the use of a condensate pump Size the pump to allow for a maximum condensate discharge of 2 GPH from the water heater Horizontal runs must be sloped 1 4 per foot towards the drain or condensate pump The condensate will be discharged by gravity force only Make the drain pipe run as short as possible The end of the drain pipe must not be ...

Page 46: ...ndensing Tankless Gas Water Heater Electrolux Condensing Tankless Gas Water Heater Note If the drain line becomes clogged or frozen condensate will back up into the water heater and a 29 error code will flash on the remote controller ceasing operation If this occurs clear the clog or freeze so that condensate can freely flow Be sure to slope the drain pipe use the appropriate size pipe allow the pro...

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