53
<The occurrence condition for error code 901 and 99 >
<Condition of occurrence for error code 99>
When the Unit has begun to operate,
- Air inlet for blockage or obstruction
- Exhaust for blockage or obstruction.
And the li fe of the unit is close.
It is the life of the unit. The unit is locked.
Basically, replace the Unit.
Manifold Gas Pressure Adjustment
Combustion abnormality
(Unit is locked)
Error Codes
Description
99
99
Display
Window
Remote
Controller
NG
LP
NG
LP
NG
LP
104%
Unit is locked.
99
NRC711-OD
NG
LP
110%
NRC711-DV
NG
LP
104%
NRC711-OD
110%
NRC711-OD
NRC711-DV
108%
110%
Unit operation
Maintenance Monitor 48
Initial Fan Speed Correction
Period of use
Model Name
Unit Conditions
Error
Code
Warning indication.
Unit continue operation.
901
Gas
type
The life of the
unit is not close.
The life of the
unit is close.
NRC711-OD
NRC711-DV
3.05
1.05
3.10
1.05
3.55
1.20
3.60
1.20
2.75
0.95
3.45
1.20
Summary of Contents for NRC661-DV
Page 17: ...NR501 OD NR662 OD Thermistor Cold Water Thermistor Hot Water Gas Proportioning Valve 17...
Page 19: ...19 5 Operation Flow Chart Water heating Shutdown procedure Ignition operation NR501 OD...
Page 20: ...Water heating Shutdown procedure Ignition operation 20 NR662 OD...
Page 71: ...located 71...