Navien NP Condensing Tankless Gas Water Heater - Service Manual

More documents

Recommendations

Info

5.23. 39Error Error occurrence conditions and check items Error 39E Flow sensor error Description As one or more units are operating in the cascade system, if no flow is detected while the system opens the water adjustment valve, the system considers it as a defective flow sensor. The system displays 39E (cleared manually) on the remote controller and the PCB, and switches into the Lock-Out mode (gas valve and ignition transformer locked). Check items 1. Check the supply of cold water. (Frozen / locked valve) 2. Defective flow sensor. 3. Defective PCB. Cancelation cascade system and faucet open Yes Water flow out? No Check supply cold water Yes Check connector Or Replace water flow sensor ©Navien America Inc. 2010 114 NR/NP series service Manual Version 2.0
Check method Error type No hot water flows Cause cold water supply error Check method 1. Check if the system opens/closes the cold water valve and the hot water output valve properly. 2. Check if the cold water line is frozen. 3. Check if the cold water filter is clogged. Water heater not working Defective flow sensor 5. Check the current flow displayed on the PCB (15.6615.66 gal/min). If the flow sensor is defective, the displayed flow value is 00.0 while water flows from the hot water tap. Disassemble the flow sensor, blow air with mouth. The hall sensor of the flow sensor is defective if the impeller rotates and display remains 0.00. 6. Check connector assembly and contact of the flow sensor. 7. Check the input voltage of the flow sensor. Operating voltage (Black+Red) : Defective PCB if DC 5 V is not supplied. 8. Replace the flow sensor if no flow is detected while the operating voltage is normal. Other trouble Defective PCB If the trouble continues despite the checking of above items, the PCB is defective Replacement of part takes the priority if an error occurs in the flow sensor. If it is impossible to replace the part, take the following emergency measures Emergency measures against defective flow sensor The CH flow sensor rotor is compatible with the NR/NP flow sensor. If the flow sensor rotor is stuck due to foreign substance Disassemble the flow sensor, blow with mouth to the right direction. If the impeller does not rotate, disassemble the impeller, and remove foreign substance before reassembling it. If the flow displayed on the PCB is 00.0, and the impeller rotates when you blow it, the hall sensor of the flow sensor is defective. The hall sensor is substituted by the CH flow sensor. >> Please clarify this procedure ©Navien America Inc. 2010 115 NR/NP series service Manual Version 2.0
Page 1:
Service Manual Service Manual Servi
Page 4 and 5:
4.4.2. NP-A Model 37 4.4.3. NR Mode
Page 6 and 7:
8.2.8. Manifold 143 8.2.9. Main Gas
Page 8 and 9:
Navien Warranty CAUTION This produc
Page 10 and 11:
WARRANTY EXCLUSIONS This warranty d
Page 12 and 13:
Abbreviation and Definition Abbrevi
Page 14 and 15:
1.4. Safety Precautions DANGER FLAM
Page 16 and 17:
DANGER WHAT TO DO IF YOU SMELL GAS
Page 18 and 19:
GAS TYPE and AC VOLTAGE WARNING Nav
Page 20 and 21:
2.2. Layout and Key Components 2.2.
Page 22 and 23:
2.2.3. NR Model No Description Navi
Page 24 and 25:
3. Technical Data 3.1. General Spec
Page 26 and 27:
3.2.2. NR, NP Model 1) Connection D
Page 28 and 29:
4.1.2. NP-A Model Exhaust pipe inta
Page 30 and 31:
4.1.3. NR Model Exhaust pipe Intake
Page 32 and 33:
YES GPS normal? YES MGV ON NO Lock-
Page 34 and 35:
B Lock-out Outlet Thermistor >= 208
Page 36 and 37:
4.3. Dip Switch Settings There are
Page 38 and 39:
4.4. Wiring Diagram 4.4.1. NR-A Mod
Page 40 and 41:
4.4.3. NR Model ©Navien America In
Page 42 and 43:
4.5. Electrical Diagnostic Points G
Page 44 and 45:
Point Function Wire Color Normal Va
Page 46 and 47:
4.6.2. Thermal Fuse Navien Part No.
Page 48 and 49:
4.6.4. High Limit Switch or Exhaust
Page 50 and 51:
4.6.6. Fan motor Navien Part No. Fu
Page 52 and 53:
4.6.8. Ignition Transformer Navien
Page 54 and 55:
4.6.10. Manifold PABCR180AMF_001 Na
Page 56 and 57:
4.6.12. GPS Navien Part No. Functio
Page 58 and 59:
4.6.14. Water Adjustment Valve Navi
Page 60 and 61:
4.6.16. Primary Heat Exchanger Navi
Page 62 and 63:
4.6.18. Buffer Tank (“A” Series
Page 64 and 65:
4.6.20. Bypass Mixing Valve (“Non
Page 66 and 67: Error Code E021 Reason Cold water i
Page 68 and 69: Check method Error type Cause The m
Page 70 and 71: Scenario 1 Is the igniter normally
Page 72 and 73: Check method Error type Cause Check
Page 74 and 75: Solenoid valve Proportional valve A
Page 76 and 77: To the direction of air supply hose
Page 78 and 79: Check method Error type Flame befor
Page 80 and 81: Check method Error type Sensor erro
Page 82 and 83: Check method Error type Sensor erro
Page 84 and 85: Does the fan moter have normal oper
Page 86 and 87: 5.8. 10Error Error occurrence condi
Page 88 and 89: Check method Error type Cause Check
Page 90 and 91: 5.9. 12Error Error occurrence condi
Page 92 and 93: Off at switch of stage Defective ai
Page 94 and 95: 5.11. 16Error Error occurrence cond
Page 96 and 97: Temperature fuse > < Check if the t
Page 108 and 109: Emergency measures against closed f
Page 110 and 111: Check method Error type Defective s
Page 118 and 119: 1. Drain water, and unfasten the up
Page 120 and 121: Check method Error type Defective s
Page 122 and 123: Check the connection of wire to wir
Page 126 and 127: 5.27. Troubleshooting guide by symp
Page 128 and 129: 5.27.2. Hot water Error Cause Remot
Page 130 and 131: 6. Inspection Check and clean the h
Page 132 and 133: 6.2.2. Adjusting the Gas-Air Ratio
Page 134 and 135: 7. Maintenance Describe precautions
Page 136 and 137: 7.3. Flushing the Heat Exchanger Fo
Page 138 and 139: 8.2. Components Replacement Instruc
Page 140 and 141: 8.2.3. Transformer 1. Turn off the
Page 142 and 143: 8.2.5. Flame Rod 1. Turn off the ga
Page 144 and 145: 8.2.7. APS 1. Turn off the gas supp
Page 146 and 147: WARNING Failure to correctly assemb
Page 148 and 149: WARNING Failure to correctly assemb
Page 150 and 151: 8.2.11. Condensation Trap 1. Turn o
Page 152 and 153: 8.2.13. Flow Sensor 1. Turn off the
Page 154 and 155: 8.2.15. Circulation Pump (“A”Se
Page 156 and 157: 8.2.16. 3-way Valve (“A” Series
Page 158 and 159: 8.2.18. Bypass Mixing Valve (“Non
Page 160 and 161: NO Description Navien Part No. Rema
Page 162 and 163: NO Description Navien Part No. Rema
Page 164 and 165: 9.3. Water Way Disassemble (NR-A)
Page 166 and 167:
9.5. Water Way Disassemble (NP-A)
Page 168 and 169:
NO Description Navien Part No. Rema
Page 170 and 171:
NO Description Navien Part No. Rema
Page 172 and 173:
10.2. Inspection Report Inspection
Page 174 and 175:
Memo ©Navien America Inc. 2010 172
Page 176 and 177:
Page 178:
show all

Navien NP Condensing Tankless Gas Water Heater - Service Manual

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?