Version 1.4
4 NCB-E Service Manual
1. Safety Information
10
1.1 Safety Definitions
10
1.2 Safety Symbols
10
1.3 Symbols Used in the Instructions
10
1.4 Safety Precautions
10
2. Product Information
14
2.1 Product Information
14
2.2 Components
15
3. Technical Data
17
3.1 General Specifications
17
3.2 Dimensions
19
4. System Details
20
4.1 Setting the DIP Switches
20
4.1.1 Setting the DIP Switches
20
4.2 Measuring the Inlet Gas Pressure
22
4.2.1 Gas Pipe Sizing Tables
(Referenced from 2012 National Fuel Gas Code)
24
4.3 Gas Conversion
26
4.4 The Front Panel
32
4.4.1 Icons and Digital Display
32
4.4.2 Buttons
33
4.4.3 Turning the Boiler On or Off
35
4.4.4 Normal Operation
35
4.4.5 Error Display and RESET
37
4.4.6 Adjusting the Space Heating Temperature
37
4.4.7 Adjusting the DHW Temperature
38
4.4.8 Viewing Basic Information (For Homeowner)
39
4.4.9 Error occurrence history display
41
4.4.10 Information display (for servicer)
42
4.4.11 Special Parameter mode
47
4.4.12 Resetting the Boiler (Factory Reset)
57
4.4.13 Cascade Protocol Settings
57
4.4.14 Cascade Set-up Procedure
58
4.4.15 Cascade Set-up Procedure for NP/NR Series Models
58
4.5 Version Display
59
4.6 Error Codes
59
4.7 Ladder Diagram
60
4.8 Electrical Diagnostic Point & Wiring Diagram
61
4.9 Key Components Description
64
4.9.1 PCB
64
4.9.2 High Limit Switch
65
4.9.3 Thermistor
66
4.9.4 Fan Motor
67
4.9.5 Flame Rod Assembly
68
4.9.6 Ignition Transformer
69
4.9.7 APS
70
4.9.8 Main Gas Valve
71
4.9.9 Burner
72
4.9.10 Flow Sensor
73
4.9.11 Primary Heat Exchanger
74
4.9.12 Secondary Heat Exchanger
75
4.9.13 DHW Heat Exchanger
76
4.9.14 Circulation Pump
77
4.9.15 3-Way Valve
78
4.9.16 Water Pressure Sensor
79
4.9.17 Auto feeder Valve
80
4.9.18 Dual Venturi
81
5. Troubleshooting
82
5.1 Error code classification
82
5.2 Error Code List
83
5.1.1 001Error
86
5.2.2 003Error
89
5.2.3 004Error
95
5.2.4 012Error
97
5.2.5 016Error
101
5.2.6 030Error
103
5.2.7 046Error
105
5.2.8 047Error
105
5.2.9 060Error
106
5.2.10 109Error
108
5.2.11 110Error
110
5.2.12 205Error
112
5.2.13 218Error
114
5.2.14 351Error
116
5.2.15 352Error
118
5.2.16 353Error
119
5.2.17 407Error
120
5.2.18 421Error
122
5.2.19 439Error
124
5.2.20 515Error
126
5.2.21 517Error
127
5.2.22 594Error
127
5.2.23 615Error
127
5.2.24 740Error
128
5.2.25 777Error
129
5.2.26 782Error
130
5.3 Troubleshooting guide by symptom
131
5.3.1 Noise
131
5.3.2 Water Temperature Issue
132
5.3.3 Circuit breaker operation
133
Contents
