TriangleTube Marquis TWH180, Marquis TWH180LP, Marquis TWH200, Marquis TWH200LP User Manual

WARNING

Marquis

User’s Manual

Model

TWH180 / TWH180LP
Gas Condensing Water Heater

• Natural Gas(NG) – TWH180

• Liquid Propane Gas (LP) – TWH180LP

Read the Installation Manual carefully and be sure that your water heater has been properly
assembled, installed and maintained. Failure to follow these instructions exactly could result in a
re or explosion, serious bodily injury and/or property damage.
Installation and service must be performed by a qualied plumber, a licensed gas tter, or a pro­fessional technician in accordance with all local codes.
Improper installation and/or operation by an unqualied person will void the warranty.

If the information in these instructions is not followed exactly, a re or explosion may result,
causing property damage, personal injury, or death.

– Do not store or use gasoline or other ammable vapors and liquids in the vicinity of this or any

other appliance.

– WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s
instructions.

• If you cannot reach your gas supplier, call the re department.

– Installation and service must be performed by a qualied installer, service agency or the gas

supplier.

Date: 7/10/15 2015-7 Marquis User

Table of Contents

Product and Safety Information

Marquis Operation ........................................................................................................ 1

Denitions ..................................................................................................................... 1

Operating Instructions ...............................................................................................2-4

Method of Operation

Before Operation .......................................................................................................... 5

Operation ...................................................................................................................... 5

Display Panel ...............................................................................................................6

LCD Display ..................................................................................................................7

Operating Mode ............................................................................................................ 8

DHW Setpoint Change Modes ..................................................................................... 9

Error Mode ..................................................................................................................10

Information Mode ........................................................................................................ 11

Installer Mode ............................................................................................................. 12

Maintenance

Regular Maintenance ................................................................................................. 13

Maintenance Procedures .......................................................................................13-15

Troubleshooting

Troubleshooting .......................................................................................................... 16

Diagnostics ............................................................................................................ 17-18

Error Codes

Error Codes ...........................................................................................................19-21

Control Logic .........................................................................................................22-24

i

Product & Safety Information

Marquis Operation

Cold water is heated by the burner as it passes
through the stainless steel heat exchanger. The burn­er ring rate constantly adjusts to maintain the DHW
setpoint temperature.

WARNING

To avoid product damage, personal injury, or
even possible death, carefully read, under­stand, and follow all the instructions in the
Marquis Installation manual before installa­tion, operation, or service.

ACV-Triangle Tube cannot anticipate every cir­cumstance that might involve a potential haz­ard. Therefore, all possible incidents are not
included in our warnings. Proper installation,
operation, and service are your responsibility.

You must be satised that the operation and
settings of the Water Heater are safe for you
and for others.

Denitions

Safety Symbols are provided in the manual. When a
user fails to adhere to the following requirements, it
may cause death, serious damage, or great property
loss.

DANGER

Indicates an imminently hazardous situation
which, if not avoided, will result in death or
serious injury.

WARNING

Indicates a potentially hazardous situation
which, if not avoided, could result in death
or serious injury.

CAUTION

Indicates a potentially hazardous situation
which, if not avoided, may result in minor
or moderate injury. It is also used to alert
against unsafe practices and hazards involv­ing only property damage.

1

Product & Safety Information

WARNING

FOR YOUR SAFETY READ
BEFORE OPERATING

If you do not follow these instructions exactly,
a re or explosion could result causing prop­erty damage, personal injury or loss of life.

A. This appliance does not have a pilot. It is

equipped with an ignition device which au­tomatically lights the burner. Do not try to
light the burner by hand.

B. BEFORE OPERATING smell all around the

appliance area for gas. Be sure to smell next
to the oor because some gas is heavier
than air and will settle on the oor.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electric switch; do not use
any phone in your building.

• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.

• If you cannot reach your gas supplier, call
the re department.

C. Use only your hand to push in or turn the gas

control knob. Never use tools. If the knob
will not push in or turn by hand, don’t try to
repair it, call a qualied service technician.
Force or attempted repair may result in a re
or explosion.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above on
this label.

2. Set the thermostat to lowest setting.
(Do not use Water Heater unless it is completely

lled with water.)

3. Turn OFF electrical power supply to the Water
Heater.

4. This Water Heater is equipped with an ignition
device which automatically lights the main burn­er. Do not try to light the burner by hand.

5. Turn gas shut-off valve clockwise to ˝OFF˝ posi­tion. Do not force

6. Wait ve (5) minutes to clear out any gas. If you
then smell gas, STOP! Follow step ˝B˝ above on
this label. If you don’t smell gas, go to next step.

7. Turn manual gas shut-off valve to ˝ON˝ position.

8. Turn ON electrical power to the appliance.

9. Wait until default temperature (120°F) is dis­played. Set desired water temperature. Turn hot
water faucet on.

10. Set thermostat to desired setting.

11. If the appliance will not operate, follow the in-

structions ˝To Turn Off Gas To Appliance˝ and call
your service technician or gas supplier.

NOTE : AUTOMATIC GAS SHUT OFF
VALVE IS RESET BY TURNING WATER
FLOW ˝OFF˝ THEN ˝ON˝ AGAIN.

WARNING

D. Do not use this appliance if any part has

been under water. Immediately call a quali­ed service technician to inspect the appli­ance and to replace any part of the control
system and any gas control which has been
under water.

This appliance must be installed in accordance with
local codes if any; if not, follow ANSI Z223.1/NFPA
54 or CAN/CSA B149.1, Natural Gas and Propane
Installation Code, as applicable.

TO TURN OFF GAS TO APPLIANCE

1. Set the thermostat to lowest setting.

2. Turn off all electric power to the appliance if
service is to be performed.

3. Turn manual gas shutoff valve to ˝OFF˝

position

2

Product & Safety Information

DANGER

Vapors from ammable liquids can explode

and catch re causing death or severe burns.

Do not use or store ammable products such
as gasoline, solvents or adhesives in the same
room or area near the appliance.

Keep ammable products

Far away from Water Heater
In approved containers
Tightly closed
Out of children’s reach

Vapors

Cannot be seen
Are heavier than air
Spread on the oor
Can spread from other rooms to the main

burner by air currents

Do not install the appliance where ammable
products will be stored.

Read and follow Water Heater warnings and
instructions. If owner’s manual is missing con­tact the retailer or manufacturer.

DANGER

Use this Water Heater at your own risk.
The outlet temperature of the Marquis Water
Heater is factory preset to 120°F (49°C). The
temperature can only be changed by using the
control panel.

Hot water temperature over 125°F (52°C) can
cause severe burns instantly or death from
scalding. Children, disabled, and elderly are at
the highest risk of being scalded. Do not leave
children or the inrm unsupervised. Check
temperature of hot water before taking a show­er or bath. To control water temperature to a
particular faucet, temperature limiting valves
can be installed by your service professional.

3

Product & Safety Information

WARNING

The Marquis Water Heater must be installed

by a qualied plumber, a licensed gas tter,
or a professional service technician.

Improper installation or operation can cause

serious injury or death.

It also voids the warranty.

• The National Fuel Gas Code NFPA 54 / ANSI
Z223.1

• National Electric Code ANSI/NEPA 70

• All applicable local, state, national and pro­vincial codes, regulations, and laws.

Proper care is your responsibility. Carefully

read and understand the Operating Informa­tion in this manual before operating the Mar­quis Water Heater.

Be aware of the location of the gas shut-off

valve and operation method.

Close the gas shut-off valve immediately if the

appliance is subjected to re, overheating,
ood, physical damage, or any other damag­ing condition that might affect the operation
of the unit.

The Water Heater must be checked by a quali-

ed technician before resuming operation.

DO NOT use this Water Heater if any part has

been submerged under water. Call a qualied
technician immediately for inspecting the Wa­ter Heater and for replacing any part of the
control system and any gas control which
has been under water.

DO NOT attempt to install, repair, or service

the Water Heater by yourself.

Contact a qualied technician if the Water

Heater needs repair or maintenance.

DO NOT use spray paint, hair spray, or any

other ammable spray near the Water Heater
or the exterior fresh air inlet port. DO NOT
place any items in or around the exterior ex­haust gas outlet port and/or fresh air inlet
port. It could restrict or block the ow in or
out of the vent system.

After installing the water heater, safety device

must be tested.

CAUTION

While repairing controls, all wires are labeled.
Also, they must be connected in accordance
with the instructions.

Wiring errors can cause improper and dan
gerous operation.

Verify proper operation after servicing.

The gas ignition system components must

be protected from water (dripping, spraying,
rain, etc.) during appliance operation and
service (circulator replacement, condensate
trap, control replacement, etc.).

Do not power up the unit unless the gas and

water supply valves are fully opened. Make
sure that fresh air intake port and exhaust gas
port are opened and functional.

4

Method of Operation

Before Operation

1. Check the Gas Type (NG/LP)

When using the unit for the rst time, check if gas
type matches with the gas type of the Water Heater.
(Check whether the gas type which is supplied is NG
or LP and also check the Water Heater gas type.)
The gas type is indicated on the rating plate on side
of the Water Heater.

2. Check the Power (120V 60Hz)

Check whether the appliance is connected properly.

3. Check the Cold Water Inlet valve

Open the appliance water inlet valve. The appliance
will not ignite when insufcient water or no water is
present at the cold water inlet.

4. Check the Gas valve

Check if the manual gas shut-off valve to the appli­ance is opened.

5. Check the Area Around the Appliance

Operation

1. Check for Gas leak

Check for gas leak at the gas connection with soapy
water.

2. Check Ventilation

Make sure that there is sufcient inow and outow of
ventilation air while using the unit.
If the ventilation is improper, then the combustion
condition deteriorates inside the appliance and it may
cause shortened life of the appliance.

3. Burn Warning

Be careful not to burn yourself by the ue or pipes.
They are getting extremely hot during operation.

4. Combustibles Warning

Do not use the appliance for any other purpose than
for heating hot water.
Do not store combustibles or ammable material
such as gasoline near the appliance.

Remove any combustible or ammable materials and
do not place any wet laundry on the exhaust vent.

5

Method of Operation

Display panel

Buttons

A ON/OFF N/A

B N/A

C Adjust set point (95°-125°) Adjust set point (125°-140°)

D N/A Change temperature unit (°C / °F)

E Menu Scroll & Setting Adjustments N/A

Push (under 5 seconds) Hold (more than 5 seconds)

Functionality

Information mode with power ON.

Installer mode with power OFF.

6

Method of Operation

LCD Display

S3 S36

S15~19S8~14

S35

1 2 3 4

S37

S31

S38

S24

Segment Name Description

S3 Anti-freeze mode Anti-Freeze mode indicated

S8,S11,S14 Lock mode Lock mode indication

S15 ~ S19 Communication state Communication state indication

S24 DHW mode Water heater operating indication

S29 ~ S33 Dot, colon Separate indication

S35 Celsius mode Celsius temperature reading

S36 Installer mode Unused

S37 Flame signal Flame Signal indication

S38 Fahrenheit mode Fahrenheit temperature reading

1A ~ 4G 8 segment Number and character indication

S29 S30 S32 S33

LCD has a backlight that will illuminate:

• When a user action has been detected (a button is pressed)

• The timeout is approximately 20 seconds.

7

Method of Operation

Operating Mode

After power on, the display shows a sequence of information during start-up. The following indications will
appear:

LCD test: All segments ON

LCD test: All segments OFF

Text “Pdn”

Show product number of control family

Text “SFn”

Show software version of control family

Text “Hdn”

Show Hardware version of control family

After start-up, the standby mode will be displayed as shown below.

Indicate on digits Show Time Examples

1 seconds

0.5 seconds

1 seconds

1 seconds Number “16”

1 seconds

1 seconds Number “1.01”

1 seconds

1 seconds Number “0001”

Indicate Indicator

Current DHW temperature setpoint

If the ow is present

If ame detected

If lock mode is activated

Temperature sign Celsius or Fahrenheit

Communication state indicate

1 ~ 4

S24

S37

S8, S11, S14

S35 or S38

S15 ~ S19

8

Method of Operation

DHW Setpoint Change Mode

The display shows the following information during water heating temperature setpoint changes.

Indicate Indicator

Current setpoint temperature

Temperature sign Celsius or Fahrenheit

If display is connected to main controller, normally the communication state will be
indicated.

When DHW setpoint range is high : from 125°F (52°C) to 140°F (60°C)

DHW display blinks.

* Initial DHW setpoint is 120°F (49°C)
* 1st DHW set-point range is 95 ~125°F (35 ~ 52°C)
When button C
and DHW icon will be blinking.
* 2nd DHW set-point range is 125 ~140°F (52 ~ 60°C).
When button C is pressed continuously at standby mode (not blinking), current DHW setpoint will be dis­played and DHW icon will be blinking. Also, caution mark(H.) will be presented.
Current DHW setpoint can be changed by rotating dial.

After changing temperature, user should press E button (enter) in order to save the value.

is pressed shortly at standby mode (not blinking), current DHW setpoint will be displayed

2, 3, 4

S35 or S38

S15 ~ S19

1(H), S29

S24

- Changing temperature unit

When button D is pressed continuously (more than 5 seconds), the temperature units will toggle. s

9

Method of Operation

Error mode

The display will show the following information when an Error occurs.

Indicate Indicator

Error ‘ Er : ’ sign Segment 1 is blinking at 1Hz

Error Code

If display is connected to main controller, normally the
communication state will be indicated.

1, 2 ,S30

3, 4

S15 ~ S19

10

Method of Operation

Information mode

When button ‘B’

is pressed shortly in standby mode, information display mode will be activated.

Index Parameter Description

A: Li or A: GA DHW Flow Current ow value(Li: L/m, GA: GPM)

b: Fr Fan rpm Current fan rpm value

C: Lc Lock Mode Lock mode is (On) or (oFF)

d: OP OP Temperature Current Operating Temperature

E: dH DHW temperature Current DHW temperature

F: Eh Exhaust Temperature Current Exhaust temperature

h: In Inlet Temperature Current Inlet Temperature

L:rt Running Time Display Running Time

1: PH Power Supply Time Power Supply Time: 100 hour increments

2: rh Burner Operating Time Burner Operating Time: 1 hour increments

L:rt

J: AG AGM Position AGM calibration

Scroll through items by turning the dial E

3: rH Burner Operating Time Burner Operating Time: 1,000 hour increments

4: It Ignition Attempts Number Ignition Attempts Number: 10 times unit displayed

5: IH Ignition Attempts Number

. Press the dial to view the currently selected item.

Ignition Attempts Number: 10,000 times unit
displayed

11

Method of Operation

Installer Mode

When button ‘B’ is pressed for 5 seconds with the unit turned off via button ‘A’, installer mode will be
activated.

Index Numbers Parameter Description

1: EH Error History Previous fault codes (H0~H9)

2: cE Clear Error History Clears error history

3: In System initialize System reset

4: Fu Flow units L/m or GPM

5: FH N/A DO NOT ADJUST

6: FL N/A DO NOT ADJUST

7: dr Reset Running time Reset running time YES/No

8: dl Reset igniting times Reset igniting times YES/No

9: HA High Altitude High Altitude Setting (0: Nomal <1< 2<4 :High Altitude)

10: Cn N/A N/A

11: CI N/A N/A

12: Eh N/A N/A

Scroll through items by turning the dial E
Select an item to change by pressing button E
After changing, press button E to save the setting.
When button B is pressed again, installer mode will be changed back to power off mode.

.

. Then, the user can change the value by rotating dial E .

12

Maintenance

Regular Maintenance

- This manual should remain with the Water Heater.
After Water Heater installation is completed, the
installation manual should be placed in a location
near the Water Heater. Maintenance instructions
should be carried out following the guidelines:

Check installation location.

Daily

Monthly

Every 6 Months

No plan for long-term
use.

Maintenance procedures [ Daily ]

- Check installation location

To prevent potential severe personal injury, death or

substantial property damage, remove all contami­nated materials.

If contaminants are found :
Remove products immediately from the area.
In order to check the status of Water Heater, call

a qualied service technician to inspect the Water
Heater for possible damage from corrosion.

DO NOT store combustible materials, gasoline or

any other ammable vapors or liquids near the Wa­ter Heater. Remove them immediately or store them
other places.

- Check if WATER HEATER casing is closed.

Check if there is any problem with the Water Heat-

er casing and the two upper and lower screws are
tightened well. Water Heater casing must be closed
while it is running.

Check if water heater casing is
closed.
Check power source.

Check vent pipe.
Check air inlet pipe.
Check relief valve.
Check condensate outlet.

Check water heater piping (gas
and water)
Operate relief valve

Do not shut Water Heater
down.

Maintenance procedures [ Daily ]

- Check power source.
Make sure that the power cord is correctly connect­ed. The power line is connected to the manual switch
inside the Water Heater.

- Check status of the control panel.
Check for any debris on the buttons or display.

Maintenance procedures [Monthly]

- Check vent pipe.
Visually inspect the ue gas vent piping for any signs
of blockage, leakage or deterioration of the piping.
Contact a qualied service technician immediately if
you nd any problem.

- Check air inlet pipe.
Visually inspect the air inlet for obstructions. Inspect
entire length of air piping to ensure the piping is intact
and all joints are properly sealed. Call your qualied
service technician if you notice any problems.

- Check relief valve.
Inspect the Water Heater relief valve and the relief
valve discharge pipe for any signs of weeping or
leakage. If the relief valve often weeps, immediately
contact your qualied service technician for inspect­ing the Water Heater system.

- Check the condensate outlet.
While the Water Heater is running, check the dis­charge end of the condensate drain tubing.
Make sure that no ue gas is escaping from the con­densate drain tubing.
If ue gas is continuously escaping, it is a serious
problem. Call your qualied service technician for in­specting the Water Heater and condensate line.

- Check vent terminal screen.

Inspect vent terminal screen for debris.
Remove any debris found.

13

Maintenance

- Cleaning Air Intake Filter

- To properly maintain the water heater, you should clean air intake lter every month. A dirty air intake lter

could cause unreliable operation.

To clean air intake lter:

1. Press Power button on the control panel to turn off the water heater.

2. Disconnect power supply to water heater.

3. Remove front cover of water heater.

4. Pull the lter out of air intake adapter.

5. Remove the lter from the plastic assembly and clean it with a toothbrush and clean running water.

6. Dry the lter completely and then reinsert the lter into the plastic assembly.

7. Replace the front cover and then reconnect the power supply to the water heater.

8. Press Power button on the front panel to turn on water heater.

- Cleaning cold water Inlet Filter

1. Place a bucket under the appliance to collect the residual water inside the water heater.

2. Press Power button on the front control panel to turn off the electrical power to the water heater and then

turn off the gas valve.

3. Close water supply valve on the inlet to the appliance. If there is no valve, turn off main water valve.

4. Open the hot water faucets completely.

5. Remove the cold water inlet lter. And then clean it with a toothbrush and clean running water.

6. To rell the water heater, follow the steps of “Cleaning cold water Inlet Filter” in reverse.

14

Maintenance

- Flushing the Water Heater

Flushing the Heat Exchanger of the water heater is
required for optimal performance. Refer to the fol­lowing instructions carefully before attempting the
procedure. If you do not understand the procedure,
contact an authorized technician or licensed profes­sional. Keep in mind that improper maintenance can
void your warranty.

1. Disconnect electric power to the water heater.

2. Close the shutoff valves on both hot water outlet

and cold water inlet lines. (V1 & V2)

3. Connect one hose “D1” to the valve “V3” and

place the free end in the bucket. Connect another
hoses“D3” to the circulation pump outlet and the
cold water inlet line at the valve “V4”. Connect
other hose “D2” to the circulation pump inlet and
place the free end in the bucket.

V3

V1

V4

V2

- Close service valve, (V4), and open shutoff valve,
(V2). Do not open shutoff valve, (V1).

- Allow water to ow through the water heater for 5
minutes.

- Close shutoff valve (V2).

8. Disconnect all hoses.

9. Remove the cold water inlet lter from the water

heater and clean out any residues.

10. Reinsert the lter and ensure the lter cap is se-

curely tightened.

11. Connect electrical power to the water heater.

Maintenance procedures [Every 6 Months]

- Check piping. (gas and water)

Visually inspect for leaks around internal water pip­ing. Also inspect external water piping, circulators,
relief valve and ttings. Immediately call a qualied
service technician to repair any leaks.
Leaks must be xed by a qualied service technician
immediately. Failure to comply with this instruction
could result in severe personal injury, death or sub­stantial property damage.

WARNING

4. Pour the instantaneous water heater cleaning
solution into the bucket. Place the hose (D1) and
hose (D2) to the pump inlet into the cleaning
solution.

5. Open service valves (V3 & V4) on the hot water
outlet and cold water inlet lines.

6. Turn on the circulation pump (Operate the pump
and allow the cleaning solution to circulate through
the water heater for at least 1 hour at a rate of 4
gallons per minute.)

7. Rinse the cleaning solution from the water heater

as follows:

- Remove the free end of the drain hose (D1) from

the bucket.

D1

D2

D3

Leaks must be xed by a qualied service
technician immediately. Failure to comply with
this instruction could result in severe personal
injury, death or substantial property damage.
This discharge line must be installed by a
qualied heating installer or a service
technician.

- Operate relief valve

Before following the procedure, verify that relief valve
outlet has been piped to a safe place of discharge,
avoiding any possibility of scalding from hot water.
If water ows freely, release the lever and allow the
valve to seat. Watch the end of the relief valve dis­charge pipe to ensure that the valve does not weep
after the line has had time to drain. If the valve weeps,
lift the seat again to attempt to clean the valve seat.
If the valve continues to weep, contact your quali­ed service technician for inspecting the valve and
system. If water does not ow from the valve even
though you have lifted the lever completely, the valve
or discharge line may be blocked. Shut down the
Water Heater immediately. Call your qualied service
technician to inspect the water heater and system.

15

Troubleshooting

Troubleshooting

Symptom Possible Causes

Burner does not ignite even if hot
water is opened.

Make sure that the ON/OFF button on the Control Panel has been turned ON.

If the monitor on the Control Panel is blank, make sure the power cord is plugged in and
fuses on the main controller are good.

Make sure that water ows to the unit. The heater will be running when the inlet water ow
sensor detects ow over 0.5gpm.

Make sure the cold and hot water pipes are not plumbed in reverse.

Make sure that water and gas supply lines are opened.

Make sure that water lines are not frozen.

Make sure that the temperature setting on the unit is not too low.

Make sure that the lter in the cold water inlet line is not clogged with debris.

Outlet water is not hot enough.

Outlet water is too hot.

Hot water temperature

The blower is still operating after the
combustion stops.

I can’t change the temperature
setting above 125°F on the Control
Panel.

Make sure that the gas supply type is correct.

Check if the supply and manifold gas pressures are in accordance with specications.

Make sure that the water ow sensor with three wires has been properly connected on the
top of heat exchanger.

Make sure that the temperature setting on the unit is not too hot.

Make sure that the lter in the cold water inlet line is not clogged with debris.

Make sure that the gas supply type is correct.

Make sure that the lter in the cold water inlet line is clean.

Check if the supply gas pressure is sufcient.

This is normal because the blower keeps operating for 3 minutes.

This is a safety device to prevent scalding. Hot water temperature over 125°F can cause
severe burns instantly or death.

Abnormal sounds come from unit
during operation.

A leak of combustion gas between sealed chamber and exhaust duct inside the unit.

Improper venting termination, make sure that the venting termination complies with
specication.

Check if the supply gas pressure is sufcient. Insufcient gas pressure can cause unstable
burner ame and noise.

16

Troubleshooting

Diagnostics and suggested corrective actions

This controller is able to record information about the water heater condition at the time of the ten previous
faults or error. The control will display the following information.

Display Condition Diagnostic Corrective Action(s)

Nothing shown on
display and blower
running at full speed.

Control is not
receiving power.

Check wiring for short
circuit or incorrect wiring.

Check for 14V output of
panel wire.

Correct wiring per wiring diagram.

Push the ‘A’ button of control panel.

Nothing is shown
on display and no
other Water Heater
components are
operating.

Nothing is shown
on control panel, but
water heater is
operating.

TEMPERATURE
RISE TOO
QUICKLY

Control is not
receiving 120V
power.

Occurs when the
communication is
lost from the control
to the display.

Occurs when supply
water temperature
in heat exchanger
rises faster than 2°F
per second during
the rst two
minutes the burner
is on.

Is there 120 Volts at the
manual switch?

Check the water heater
inside power manual switch.

Check for 120 volts at the
line voltage terminal inside
the water heater case.

Check for loose connec­tions and proper pin
alignment/ engagement on
the Control's plug.

Cycle power off and on
using water heater power
switch and check for
operation.

Automatically resets after a
few minutes delay or use
manual reset.

Correct the power supply from the manual
switch.

Turn on the manual power switch inside the
water heater case.

Correct wiring inside the water heater case
using the wiring diagram in this manual.

Check for continuity on the wire harness from
the display to the control panel. See repair parts
section for proper replacement part.

Replace with new display module. See repair
parts section for proper replacement part.

See TEMPERATURE SENSOR and follow
procedures for loose connections.

TEMPERATURE
SENSOR

Occurs when a
temperature sensor
has electrically
shorted(SHORT) or
has become
disconnected
(OPEN).

Reset by pressing
the On/Off button
on the display.

17

Check all the temperature readings of the water
heater in the information menu to determine if
any sensors are currently displayed as SHORT
or OPEN.

Check wire harness for loose connections and
pin engagement at sensor Connection and
Control module.

If problem persists after checking items above,
replace Control.

Troubleshooting

Display Condition Diagnostic Corrective Action(s)

FLAME FAULT

Occurs when ame
is detected when
there should be no
ame

Reset using manual switch.
Reset screen on control
panel.
(Power button)

Burner may be operating too hot due to
incorrect combustion.

Check for ame at burner through observation
port with burner off. If ame continues after
shutdown, replace gas valve.

BLDC Fan FAULT BLDC Fan is unable

to reach required
speed or 0 RPM
when it is turned off.

IGNITION
FAULT

GAS VALVE
FAULT

Water heater failed
to light after 10
attempts.

The Control has
detected a problem
with its gas valve
output circuit

Reset using manual switch.
Reset screen on control
panel.
(Power button)

Reset using manual switch.
Reset screen on control
panel.
(Power button)

Reset using manual switch.
Reset screen on control
panel.
(Power button)

Check wire harness for loose connections and
pin engagement at blower connections.

Water heater is in standby mode and fan is not
running. If FAN SPEED is not 0 RPM then
replace the fan.

Check for spark through sight glass.

Check incoming gas pressure to water heater
when off and during ignition. Adjust within limits
on rating plate.

Check for vent pipe and intake pipe restrictions
or blockage

Check burner fasteners and gaskets

Check air intake pipe and orice

Check wire harness connections between gas
valve and Control.

18

If lockout reoccurs, replace Gas valve.

Error Codes

Error codes

Error
Code

11 Ignition has Failed 10 (Ten) Times

16

20

Error Code Description Possible Remedies

Operating Temperature Sensor or
D HW S e n so r d e t e c t s W at er
Temperature Gre ater than 199

(93

)

°C

High Limit Overheat Switch – Closed
is Normal, Open is Fault

APS /Condens ate – Closed is

29

Normal, Open is Fault (Conden­sate Drain Trap)

31 Inlet Water Sensor Open or Short

32 DHW Sensor Open or Short

Press the Power button to clear the Error Code.
If Error happens again:

1. Monitor the gas pressure to the water heater while in operation. Ensure pressure
is between 3.5 and 14” WC.

2. Check gas valve wire. Ensure connection is secure.

3. Check ame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.

4. Check igniter transformer for proper connection.

5. Clean the igniter with steel wool to remove oxides. Ensure proper separation
(3-4 mm).

6. Replace the spark igniter if damaged.

7. Assure that the ame is stable when lit.

8. If the problem persists, replace the main control.

This Error Code will go away when the DHW temperature decreases.
If Error happens again:

1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for
normal operation.

2. Check if DHW pipe is blocked. Ensure there is enough water owing to the water

°F

heater.

3. Check DHW sensor at DHW outlet. If resistance is zero, replace the sensor.

4. Check Operating Temperature sensor at the heat exchanger. If resistance is zero,
replace the sensor.

5. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.

1. Inspect the High Limit Overheat switch. Ensure proper connections.

2. Check High Limit Overheat switch resistance. If resistance is zero, replace the
switch.

3. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.

1. Check APS/Condensate and main controller connections. Ensure all are secure.

2. Check APS/Condensate resistance. If resistance is zero, replace the switch.

3. Check APS/Condensate hose. Ensure it is connected and in good condition.

4. Check condensate line and termination for blockages.

5. Check exhaust vent for blockages.

6. If the problem persists, replace the main control.

This Error Code will go away when inlet water temperature decreases.
If Error happens again:

1. Check inlet water temperature sensor. Ensure connections are secure.

2. Check sensor resistance. If resistance is zero, replace the sensor.

3. If the problem persists, replace the main control.

This Error Code will go away when outlet water temperature decreases.
If Error happens again:

1. Check DHW outlet temperature sensor. Ensure connections are secure.

2. Check sensor resistance. If resistance is zero, replace the sensor.

3. If the problem persists, replace the main control.

Lockout

Type

Hard Lock

Soft Lock

Hard Lock

Hard Lock

Soft Lock

Soft Lock

19

Error Codes

Error

Code

33

35 Exhaust Sensor Open or Short

39

40

41 Fan Speed too High with Flame On

43 Burner Overheat Switch Open

61

Error Code Description Possible Remedies

Operat i n g Temperatur e Se n s o r
Open or Short

Flame Detected af t e r Ex iting a
Flame On Condition

Gas Leakage is Detected for 10 Min­utes, or three times within One Hour
(Greater than 5 Seconds Each Time)

Fan Speed Feedback Signal
Abnormal

This Error Code will go away when operating water temperature decreases.
If Error happens again:

1. Check operating temperature sensor. Ensure connections are secure.

2. Check sensor resistance. If resistance is zero, replace the sensor.

3. If the problem persists, replace the main control.

This Error Code will go away when exhaust temperature decreases.
If Error happens again:

1. Check exhaust temperature sensor. Ensure connections are secure.

2. Check sensor resistance. If resistance is zero, replace the sensor.

3. Check exhaust vent for blockage.

4. If the problem persists, replace the main control.

This Error Code will go away when the false ame condition is remedied.
If Error happens again:

1. Check the water heater cover. Ensure it is secure. Flame detection sensor can de­tect an external light source.

2. Check ame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.

3. If the problem persists, replace the main control.

IMPORTANT: If you smell gas, STOP! Follow the instructions on the cover of this
manual, and call a qualied service technician or the gas utility.
Press the Power button to clear the Error Code.
If Error happens again:

1. Check the water heater cover. Ensure it is secure.

2. Check gas connections for leakage with a soapy solution. Fix any leaks.

3. Check condition of the burner assembly.

4. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.
If Error happens again:

1. Check the vent connections for blockages.

2. Check the burner assembly.

3. Check fan operation. If fan appears to be operating normally but RPMs are too low
or too high, replace the fan.

4. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.
If Error happens again:

1. Check burner overheat switch connections. Ensure connections are secure.

2. Check switch resistance. If resistance is zero, replace the switch.

3. If the problem persists, replace the main control.

This Error Code will go away when the condition is remedied.
If Error happens again:

1. Check the connections to the fan. Ensure all are secure.

2. If the fan does not rotate during the ignition sequence, check for 120V power at
the fan connection. If 120V power is present at the control, replace the fan. If the
blower does not have 120V power, check power at the control. If 120V power is not
present at the control, replace the control.

3. If the problem persists, replace the main control.

Lockout

Type

Soft Lock

Soft Lock

Soft Lock

Hard Lock

Hard Lock

Hard Lock

Soft Lock

20

Error Codes

Error

Code

65 Supply Water Valve Error

66 Mixing Valve Error

67 AGM Error

72

73 DIP Switch is abnormal

76 Poor Communication

94

Error Code Description Possible Remedies

Flame Signal Detected before Igni­tion

Exhaust NTC detects Vent Tempera­ture is Greater than 149°F (65°C)

Press the Power button to clear the Error Code.
If Error happens again:

1. Turn power OFF and ON at the main power switch internal to the water heater.

2. Check wiring connections to supply water valve. Ensure all are secure.

3. Replace supply water valve.

4. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.
If Error happens again:

1. Turn power OFF and ON at the main power switch internal to the water heater.

2. Check wiring connections to mixing valve. Ensure all are secure.

3. Replace mixing valve.

4. If the problem persists, replace the main control.

Press the Power button to clear the Error Code.
If Error happens again:

1. Turn power OFF and ON at the main power switch internal to the water heater.

2. Ensure fan inlet hole is completely open after turning the power OFF and ON.

3. Check wiring connections to the AGM. Ensure all are secure.

4. Check AGM operation.

5. Replace AGM.

6. If the problem persists, replace the main control.

This Error Code will go away when the condition is remedied.
If Error happens again:

1. Check the water heater cover. Ensure it is secure. Flame detection sensor can de­tect an external light source.

2. Check ame detection sensor. Ensure connections are secure. Normal operating
settings are more than 2.5DC before ignition, less than 2.5DC after ignition.

3. If the problem persists, replace the main control.

This Error Code will go away when the condition is remedied.
If Error happens again:

1. Check dip switches. Ensure switches match the ratings plate requirements of the
water heater.

2. If the problem persists, replace the main control.

This Error Code will go away when the condition is remedied.
If Error happens again:

1. Check connections from main control to display panel.

2. If the problem persists, replace the display and/or the main control.

This Error Code will go away when the condition is remedied.
If Error happens again:

1. Check if dip switch High Fire setting is ON. Switches 6 and 7 should be OFF for
normal operation.

2. Check exhaust temperature sensor. Ensure connections are secure.

3. Check sensor resistance. If resistance is zero, replace the sensor.

4. Check exhaust vent for blockage.

5. If the problem persists, replace the control.

6. If the problem persists, replace the heat exchanger.
* In Case Of PVC Vent Setting, Exhaust NTC detects Vent Temperature is Greater
than 149°F (65°C)

Lockout

Type

Hard Lock

Hard Lock

Hard Lock

Soft Lock

Soft Lock

Soft Lock

Hard Lock

21

Error Codes

1. Flame Detection

22

Error Codes

2. Gas Detection

3. Sensing air pressure.

23

Error Codes

4. ‘I/T’, ‘DHW’, ‘OP’ Sensor detects

Error code contents

E31 Inlet water NTC open or short

E32 DHW NTC open or short

E33 OP NTC open or short

E35 Exhaust NTC open or short

24

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Additional quality water heating equipment available

from Triangle Tube

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- Exclusive Tank-in-Tank design

- Stainless steel construction

- Available in 7 sizes

- Limited LIFETIME residential warranty

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- For domestic water, snow melting, radiant floor

- Plates made of stainless steel, with a 99.9% copper
and brazed, ensuring a high resistance to corrosion

- Self cleaning and self descaling

- Computerized sizing available from Triangle
Tube/Phase III

- Available in capacities from 25,000 BTU/hr to
5,000,000 BTU/hr

PRESTIGE CONDENSING WALL MOUNTED BOILER

- 95% AFUE

- Fully modulating

- Natural gas or propane

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- Direct vent with standard schedule 40 PVC

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