(F)61 Fan Motor Abnormality - Noritz WHiC56 Service Manual

Error Code 61 Fan Motor abnormality
Only connect and disconnect the connector after the fan has
stopped rotating and then disconnect the electrical power.
(The Circuit Board and Fan Motor may be damaged otherwise.)
Fan Motor is rotating.
YES
NO
Check the voltage to the Fan Motor.
Normal
CN27
1 Between Brown 4 - Blue 2 DC 7 - 45V.
2 Between Red 1 - Blue 2 DC 10 - 14V.
Check the fan speed.
Normal
CN27 : Yellow 3 - Blue 2 100 - 400Hz (6,000 - 24,000pulse/minute)
(Also check that the data displayed on maintenance monitor, the difference
between No. 10 and No. 20 data is within ± 500rpm when the maximum or
minimum burner pressure set button is pressed.)
The problem may be due to a cause other than the appliance.
* If the problem does not reappear and only appears on the error code history, it could be due to a cause other than the unit, such as
temporary blockage due to wind gusts or obstruction, a drop in the supply voltage (below AC 207 or 216V), etc.
Please explain this to the customer.
Abnormal
(because there is the possibility of fan phase interruption.)
Abnormal
<Condition of occurrence for error code 61>
When the Unit is in following conditions, the error code is displayed.
- If the fan speed is 200rpm more or less than the target speed
during iginition or pre purge.
- If the fan speed is lower than 500rpm during the combustion.
- If the fan speed is 500 (200) rpm more or less than the target speed
during combustion.
1 4 BR
3 Y
2
1 2 BL
1
2 R
<CN27>
4 BR
3 Y
2 BL
1 R
<CN27>
- 38 -
Replace the Circuit Board set.
Circuit Board
4 3 2 1
POWER R BL G
<CN102>
CIRCUIT
BOARD
<CN104>
7
6
5
4
3
2
1
<CN103>
<FUSE 10A>
Replace the Fan Motor.
Replace the Fan Motor.
Circuit Board
4 3 2 1
POWER
R BL G
<CN102>
CIRCUIT
BOARD
<CN104>
7
6
5
4
3
2
1
<CN103>
<FUSE 10A>
7
6 W
5 Y
4
3
2 W
1 O
4
BR
3
Y
2
BL
1
R
<CN27>
3 BK
2
1 W
<CN92>
7
6 W
5 Y
4
3
2 W
1 O
4 BR
3 Y
2 BL
1 R
<CN27>
3 BK
2
1 W
<CN92>