Ferguson JWSH100150 Manual Do Utilizador

31

The installer may be able to observe and correct certain problems which 

might  arise  when  the  unit  is  put  into  operation  or  when  it  is  re-fired 

after a prolonged shutdown. HOWEVER, it is recommended that only 

qualified servicemen, using appropriate test equipment, be allowed to 

service the heater.

BE SURE TO TURN OFF THE ELECTRICITY WHENEVER POSSIBLE OR 

APPROPRIATE WHILE CHECKING EQUIPMENT.

FAILURE  TO  FOLLOW  THESE  INSTRUCTIONS  CAN  RESULT  IN 

SERIOUS PERSONAL INJURY OR DEATH.

CAUTION:    LABEL ALL  WIRES  PRIOR TO  DISCONNECTION  WHEN 

SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPER 

AND DANGEROUS OPERATION. 

VERIFY PROPER OPERATION AFTER SERVICING.

  1.  Refer to TROUBLESHOOTING.

  1.  Be certain the electrical disconnect switch serving the water heater  

is in the ON position.

  2.  Check the fuses.

 

•  The electrical disconnect switch usually contains fuses.

  3.  The capacity of the heater may have been exceeded by a large demand 

for hot water.

•  Large  demands  require  a  recovery  period  to  restore  water 

temperature.

  4.  Colder incoming water temperature will lengthen the time required to 

heat water to the desired temperature.

•  If the heater was installed when incoming water temperature was  

warm, colder water creates the effect of less hot water.

  5.  Look for hot water wastage and leaking or open hot water faucets.

  6.  Sediment or lime scale may be affecting water heater operation.  Refer 

to MAINTENANCE for details.

  7.  Burner may not be firing at proper rate.

 

•  Check gas pressure. Adjust to obtain required manifold pressure.

  8.  Burner fan wheel may be dirty.

 

•  Clean fan wheel with a stiff brush.

  9.  Condensate hose may be blocked where it connects to the exhaust 

elbow.

 

•  Verify the condensate drains from the unit without restriction.

  1.  Refer to WATER TEMPERATURE CONTROL.

  1.  Sediment or lime scale accumulations cause rumbling and pounding 

noises when the heater is operating.

 

•  The sounds are normal, however, the tank bottom should be cleaned.  

Refer to MAINTENANCE for details.

  2. Some of the electrical components of the water heater make sounds 

which are normal.

 

•  Contacts click or snap as the heater starts and stops.

 

•  Transformers often hum.

  1. Check to see if the water heater drain valve is tightly closed. Also    

check the cleanout opening for leakage.

  2. The apparent leakage may be condensation which forms on cool    

  surfaces of the heater and piping.

  3. If the outlet of the relief valve is leaking it may represent:

 

•  Excessive water pressure.

 

•  Excessive water temperature.

 

•  Faulty relief valve.

Excessive water pressure is the most common cause of relief valve leakage. 

It is often caused by a “closed system”. If a check valve is in the inlet system 

it will not permit the expanded hot water volume to equalize pressure with 

the main. The relief valve must release this water or the water heater or 

plumbing system will be damaged. Refer to MAINTENANCE-RELIEF VALVE 

section in this manual.

When such a condition is encountered, local codes or inspection agency 

should be consulted to determine which system is acceptable in your area.  

See CLOSED SYSTEM section in this manual also.

1.  Verify that the allowable vent length has not been exceeded and that the 

blower inlet screen has been removed if direct venting.

2.  Verify that the condensation, which WILL be present in the heater and  

exhaust vent, will drain.

3.  Check supply wire polarity - hot to hot and neutral to neutral and no  

"stray" current in neutral.

4.  Heater is properly grounded.

Checking these four (4) items first will often result in a timely solution to the 

service call.

JUMPING  OUT  COMPONENTS  AND/OR  CIRCUITS  DURING 

TROUBLESHOOTING  CAN  CAUSE  SERIOUS  PROBLEMS  WITH THE 

UNIT’S OPERATING SEQUENCE AND IGNITION SAFETY. IF YOU DO 

NOT HAVE THE PROPER TEST EQUIPMENT, I.E. A VOLT-OHM METER 

AND A MICROAMMETER, DO NOT ATTEMPT TO TROUBLESHOOT OR 

REPAIR STATE EQUIPMENT.

ALTERING  THE  CONTROLLER AND/OR  CONTROLLER  WIRING  IN 

ANY WAY COULD RESULT IN INTERNAL DAMAGE TO THE MODULE 

CIRCUITS, POSSIBLY ALTERING THE IGNITION SEQUENCE ALLOWING 

GAS VALVES TO OPEN BEFORE THE HOT SURFACE IGNITER IS UP TO 

IGNITION TEMPERATURE.

NOTE:  ANY BYPASS OR ALTERATION OF THE UNITS SAFETIES WILL 

RESULT IN VOIDING THE APPLIANCE WARRANTY.

Before performing any troubleshooting familiarize yourself with the particular 

appliance.

Refer  to  the  SEQUENCE  OF  OPERATION  and  the  connection  diagram 

located on page 15 before continuing.

Make sure the appliance is connected to a 120V AC power supply, manual 

gas valve is in the ON position, and all electrical connections are secure 

before continuing to troubleshoot this appliance.

 

THE  WATER  HEATER  IS  POLARITY  SENSITIVE.  BEFORE APPLYING 

ELECTRICITY TO THIS HEATER BE CERTAIN THAT SUPPLY HEATED 

WIRE TO GROUND CHECK INDICATES ZERO VOLTAGE.