Kiturami KRP-20A, User Manual

22

04
05

▶

08

06

07

▶

Troubleshooting

Trouble: Disconnection of temperature sensor and overheat sensor

No

Failure

Troubleshooting

Remarks

No

Failure

Troubleshooting

Remarks

Trouble: Defective transmission/reception

1. Water temp. 

    sensor 

    disconnected

2. Overheat 

    sensor 

    disconnected

1. Blower RPM 

    not detected

2. Low limit,

    High limit

3. Defective

    transmission/

    reception

①

 Check the water temperature sensor for 

     correct connection.

②

 Check the wiring for damage.

③

 Replace the temperature sensor.

①

 Check the overheat sensor for correct

     connection.

②

 Check the wiring for damage.

③

 Replace the temperature sensor.

①

 Check the wiring of the blower for 

     damage.

②

 Replace the blower.

①

The RPM of the blower is too low or too high due to foreign 

 materials  caught on the blower housing

②

Too high RPM of the blower or the exhaust may be caused by

     strong wind when the flue is installed in the wind pressure zone

     Contact the installation shop about changing the location of the

     flue.

③

 Remove condensate from the curved part of the flue, if any.

④

 Contact your distributor or the after-sales service center.

①

 Defective transmission/reception of the room controller and 

    the main controller: Ignition travel turned off

②

 If the problem persists for more than ten minutes, Error 08 

    has occurred, and the power LED blinks.

③

 Replace the room controller (automatic recovery).

Disassembled

part of burner

23

98

▶

96

▶

Troubleshooting

Trouble: Overheat error

Trouble: Triggering of the overheat sensor (bimetal) due to 

              counter-flow of flame 

No

Failure

Troubleshooting

Remarks

No

Failure

Troubleshooting

Remarks

1) Symptom: Detecting water temperature higher than 93

℃

 by the water temperature sensor/detecting 

    temperature higher than 92

℃

 by the overheat sensor

2) Recovery: Automatic recovery upon water temperature lower than 88

℃

/overheat lower than 87

℃

1) Step 1: Temperature at the water temperature sensor lower than 10

℃

 - Released when the circulation 

pump operates at temperature higher than 12

℃

2) Step 2: Temperature at the water temperature sensor lower than 7

℃

 - The circulation pump and the burner 

start operation.

1. The circulation 

    pump 

    inoperable

2. The CH valve kept

    lock to cause rapid

    elevation of temp

    erature

3. Controller 

    failure

Installing

detachable

pump

Installing the 

boiler in the 

boiler room

①

 Check the circulation pump circuit of the coil. 

The measurement result for a resistance of ‘0’

    indicates normal operation; ‘infinite’ indicates a 

    circuit of the coil. Replace the circulation pump.

①

 Check whether the distributor valve is locked;

     if it is, open the locked valve.

①

The feed motor continues operating even 

     when the fuel feed is in the halting mode.

②

 Replace the controller.

1. Fuel clogged

2. No Tee installed

    on the flue causing

    head wind

3. Fire tube 

    clogged

4. Poor air-tightness 

   of the fuel feed line

①

 Clean the flue.

①

 Install a Tee on the flue to prevent head wind.

①

 Clean the fire tube of the boiler.

①

 Poor air-tightness of the hoses and the pipes used 

     for feeding the fuel to the burner causes overheat

     ing. Disassemble the band, check the air-tightness, 

     and reassemble the band.