Table of Contents
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Improper installation, adjustment, altera-
tion, service or maintenance can cause
personal injury or property damage. Refer
to this manual. For assistance or addition-
al information, contact a qualified installer,
service agency, or the gas supplier.
© 2017 NORCOLD, INC. All rights reserved.
Polar 7 Series (N7V, N7X, N7LX) Models
Polar 8 Series (N8V, N8X, N8LX) Models
Questions? 1-800-444-7210
Service Manual
Gas Electric Refrigerators
Part No. 639410 Rev. A 04.17.2018
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Table of Contents
Troubleshooting
Related Manuals for Norcold Polar N7V
Summary of Contents for Norcold Polar N7V
- Page 1 Refer to this manual. For assistance or addition- al information, contact a qualified installer, service agency, or the gas supplier. Questions? 1-800-444-7210 Part No. 639410 Rev. A 04.17.2018 © 2017 NORCOLD, INC. All rights reserved.
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Page 2: Table Of Contents
Diagnostic Pre checks ...................38 FAULT CODES - N7V AND N8V MODELS ......17 Fault Code Flash Patterns - N7V and N8V Models ........17 FAULT CODES - N7LX AND N8LX MODELS ......39 www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... - Page 3 Ice Maker Only ....................58 Ice Maker and Fan ..................59 Ice Maker, Fan, and Cold Weather Heater ............59 ICE MAKER ................60 REMOVE / REPLACE THE REFRIGERATOR ......60 Remove the Refrigerator ................60 Replace the Refrigerator ................60 Conduct Leak Test ..................60 www.norcold.com SERVICE MANUAL...
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Page 4: Safety
Handle a leaking cooling unit with extreme caution! The cooling unit contains am- Norcold refrigerators are designed and monia, hydrogen, and sodium chromate. equipped for the use of propane gas only. Ammonia can cause severe skin and eye Do not modify, alter, or equip the refrigera- burns. -
Page 5: Introduction
® If unable to resolve technical issues using the information provided changes at any time without notice. in this manual, technical support is available through NORCOLD ® Customer Service Center: Certification and Code Requirements Telephone:... -
Page 6: Model Identification
Be sure to have the cooling unit serial NOTICE number available if you need technical support on this component 1167359 NORCOLD Fig. 2 - Cooling unit bar code label location. Refrigerator Model Number NORC OLD Serial Number xxx VOLTS - AC xx HZ x.xx AMPS... -
Page 7: Specifications
Burner rating (Heat output) ------------------------------------------------------------------------------------------------------1750 Btu/h @ 11 in. W.C. Burner orifice size -------------------------------------------------------------------------------------------------------------------- LP18 (not replaceable) Gas ignition ---------------------------------------------------------------------------------------------------------------------Electronic with flame sensing Electrode tip-to-burner gap ------------------------------------------------------------------------------------------------------------------- 1/8 to 3/16 inch Off-level operating limits Side-to-side-------------------------------------------------------------------------------------------------------------------------------- 3 degrees-maximum Front-to-back ------------------------------------------------------------------------------------------------------------------------------ 6 degrees-maximum www.norcold.com SERVICE MANUAL... -
Page 8: Exploded Views
LED Assembly User Interface Assembly (Control Assembly) Strike Plate User Interface Housing (Control Housing) Thermistor Short Wire Shelf Top Trim Piece Full Wire Shelf Bottom Trim Piece Cut Out Wire Shelf www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 9: Fig. 5 - Exploded Rear View
Gas Train Support Bracket / Burner Door Assembly Drip Cup DC Board Assembly (3-way models only) Red Input Wire (3-way models only) Black Input Wire (3-way models only) Communication Harness (3-way models only) AC Power Cord Main Control Board Assembly (Power Board Assembly) www.norcold.com SERVICE MANUAL... -
Page 10: General Information
If this air flow is blocked or decreased, the refrigerator may not cool correctly. Each NORCOLD model is certified by AGA and CGA for correct ventilation. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 11: Propane Gas Connections
■ Do not use an open flame to examine for leaks. board (power board). On 3-way models, this connection is made ■ Do not connect the refrigerator to the propane gas tank without to the DC control board terminal marked “GND”. a pressure regulator between them. www.norcold.com SERVICE MANUAL... -
Page 12: Main Control Board (Power Board) Fuses
Power to the heater is continuously supplied by the main control board (power board). Condenser Auxiliary Wire Harness P1-1 Auxiliary 12 VDC (ground) P1-6 Auxiliary 12 VDC (positive) www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 13: Temperature Control System
■ N7V and N8V models: • In Auto AC mode, the green power ON / indicator light will NORCOLD CANNOT ACCEPT RESPON- SIBILITY FOR REPAIRS, ADJUSTMENT, flash OFF once every 20 seconds and repeat until the OR MAINTENANCE PERFORMED BY thermistor is sensed to be operating correctly. -
Page 14: Clean The Openings Of The Burner Tube
12. Connect the two (2) white wires to the gas valve of the gas train assembly. 13. Open the valve at the vehicle propane gas tank(s). 14. Examine all of the gas connections for leaks. Refer to the “Conduct Leak Test” procedure. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 15: User Interface (Controls) - N7V And N8V Models
NORCOLD ■ 1st Priority Choice - Auto Mode While in the Auto Mode, the AC cartridge heater is operated to provide heat to the boiler area of the cooling unit and the power ON / indicator light (See Fig. -
Page 16: Air In The Propane Gas Supply Lines
■ Red shows the COLDEST temperature setting. Touch and release the Power ON button and the Power ON / indi- cator light will flash on and off, which indicates that the temperature setting can be changed. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 17: Fault Codes - N7V And N8V Models
Fault Code Flash Pattern Fault Code Meaning Action to Take Flash Pattern Appears Here NORCOLD The refrigerator tried to operate on the selected energy Refer to ”Fault - Code - Solid Red Indica- source(s) with no success. tor Light” on page 18. -
Page 18: Troubleshooting Flowcharts - N7V And N8V Models
TROUBLESHOOTING FLOWCHARTS - N7V AND N8V MODELS Fault - Code - Solid Red Indicator Light Red, on solid. NORCOLD Plugged Possible Cause: into working AC Correct AC outlet. outlet with min. 120 VAC power is not available. Refrig- 85 VAC? erator defaulted to propane gas opera- tion, but did not establish a flame.(Gas... - Page 19 74-92 Ohms? Wires to gas valve connected Correct. Replace wires if needed. w/continuity? Does main control Replace main control board assembly board (pwr board) (power board assembly). supply 12VDC to gas train? Replace gas train. NOR000707A www.norcold.com SERVICE MANUAL...
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Page 20: Fault Code - Flash Pattern 1
Fault Code - Flash Pattern 1 Red, flashes on one (1) time, is off five (5) seconds, repeats. NORCOLD Before starting this procedure: The AC is off when it should be on. AC ■ Make sure that the AC voltage to the refrigerator is 108-132 heater “lockout”. -
Page 21: Fault Code - Flash Pattern 2
TROUBLESHOOTING FLOWCHARTS - N7V AND N8V MODELS, cont’d. Fault Code - Flash Pattern 2 Red, flashes on two (2) times, is off five (5) seconds, repeats. NORCOLD Are gas valve wires Correct. Possible Cause: plugged in? The main control board assembly (pow- er board) detected an internal fault. -
Page 22: Fault Code - Flash Pattern 5
TROUBLESHOOTING FLOWCHARTS - N7V AND N8V MODELS, cont’d. Fault Code - Flash Pattern 5 Red, flashes on five (5) times, is off five (5) seconds, repeats. NORCOLD The gas valve is Replace gas train assembly “mechanically” stuck open. A flame is sensed at the burner when there should be none present. -
Page 23: Fault Code - Flash Pattern 10
Red, flashes on ten (10) times, P1-14 of main control board assembly is off five (5) seconds, repeats. NORCOLD (power board) and P1-3 of user interface (optical display). Possible Cause: Communications between the user... -
Page 24: Fault Code - Thermistor Fault
TROUBLESHOOTING FLOWCHARTS - N7V AND N8V MODELS, cont’d. Fault Code - Thermistor Fault Green, flashes off once every twenty seconds. NORCOLD thermistor Plug in thermisor wire. wire plugged Possible Cause: The refrigerator is operating on AC electric power. The thermistor has been... -
Page 25: Blank Display
Blank Display Before starting this procedure verify: NORCOLD ■ Vehicle DC voltage to the refrigerator is 10.5 to 16.0 volts. Blank display. ■ No other appliance or lighting circuit is connected to the refrig- erator DC circuit. Possible Cause: ■ DC input of the vehicle is wired into the main control board ac- The refrigerator will not turn ON. -
Page 26: User Interface (Controls) - N7X And N8X Models
AC mode indicator only comes on. ■ MANUAL GAS mode: The refrigerator operates using only MODE NORCOLD propane gas as the power source and the propane gas mode indicator only comes on. Temperature Set Button Fig. -
Page 27: Air In The Propane Gas Supply Lines
3-times, followed by a 5-second pause, and then repeated as long as the fault condition is present (See Fig. 13). The refrigerator is not cooling if the power NOTICE ON / indicator light [185] is either on solid RED or flashes on RED. www.norcold.com SERVICE MANUAL... -
Page 28: Fault Code - Flash Patterns
Fault Code Flash Pattern Fault Code Meaning Action to Take MODE NORCOLD Flash Pattern Appears Here The refrigerator tried to operate on the se- Refer to “Fault Code - Solid Red Indicator Light” on lected energy source(s) with no success. -
Page 29: Troubleshooting Flowcharts - N7X And N8X Models
The thermistor has been sensed as inoper- Refer to “Fault Code - Thermistor Fault” on page 35. able, so the temperature is being controlled MODE NORCOLD via backup operating system. Temperature setting snowflake(s) flash on/off at one (1) second intervals anytime the user interface (control) is “awake”. - Page 30 Correct. Replace wires if needed. w/continuity? Does main control Replace main control board assembly board (pwr board) (power board assembly). supply 12VDC to gas train? NOR000707A Replace gas train. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL...
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Page 31: Fault Code - Flash Pattern 1
Fault Code - Flash Pattern 1 Before starting this procedure: MODE ■ Make sure that the AC voltage to the refrigerator is 108-132 NORCOLD VAC. Red, flashes on one (1) time, is off ■ Make sure no other appliance or lighting circuit is connected to five (5) seconds, repeats. -
Page 32: Fault Code - Flash Pattern 2
TROUBLESHOOTING FLOWCHARTS - N7X AND N8X MODELS, cont’d. Fault Code - Flash Pattern 2 MODE NORCOLD Are gas Red, flashes on two (2) times, is off valve wires Correct. plugged in? five (5) seconds, repeats. Possible Cause: The main control board assembly (pow- er board) detected an internal fault. -
Page 33: Fault Code - Flash Pattern 5
TROUBLESHOOTING FLOWCHARTS - N7X AND N8X MODELS, cont’d. Fault Code - Flash Pattern 5 MODE NORCOLD The gas valve is Replace gas train assembly “mechanically” stuck open. Red, flashes on five (5) times, is off five (5) seconds, repeats. NOR000709A A flame is sensed at the burner when there should be none present. -
Page 34: Fault Code - Flash Pattern 10
Check that the blue wire, within the main wire harness, is fully plugged in; both at MODE P1-14 of main control board assembly NORCOLD (power board) and P1-3 of user interface Red, flashes on ten (10) times, is off (optical display). -
Page 35: Fault Code - Thermistor Fault
TROUBLESHOOTING FLOWCHARTS - N7X AND N8X MODELS, cont’d. Fault Code - Thermistor Fault MODE NORCOLD thermistor Plug in thermisor wire. wire plugged Temperature setting snowflake(s) flash on/off at one (1) second intervals anytime the user interface (control) is “awake”. Possible Cause:... -
Page 36: Blank Display
TROUBLESHOOTING FLOWCHARTS - N7X AND N8X MODELS, cont’d. Blank Display Before starting this procedure verify: MODE ■ DC voltage to the refrigerator is 10.5 to 16.0 volts. NORCOLD ■ No other appliance or lighting circuit is connected to the refrig- Blank display. erator DC circuit. Possible Cause: ■... -
Page 37: User Interface (Controls) - N7Lx And N8Lx Models
AC heater does not operate, the electronic controls of the refrigerator automatically change to the second choice of operation. MODE NORCOLD AUTO ■ The second choice of operation is propane gas. If AC CODE electric is not available, the controls select gas as the power choice. -
Page 38: Gas Mode
Burn hazard! Allow canister and heaters WARNING to cool before attempting to remove and ATTENTION replace. The DC electric heater will cycle in response to the fin temperature to maintain the cabinet temperature. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 39: Fault Codes - N7Lx And N8Lx Models
A flame is sensed at the burner when there should be none Refer to “Fault Code - “FL” present. “- -” with audible alarm” on Alternately flashes “FL” and “--” page 47 with an audible alarm. CODE CODE www.norcold.com SERVICE MANUAL... -
Page 40: Troubleshooting Flowcharts - N7Lx And N8Lx Models
Gas valve solenoid coil Replace gas train assembly. resistance 74-92 Ohms? NOR000707A Continued on following page. Wires to gas www.norcold.com valve connected Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL Correct. Replace wires if needed. w/continuity? - Page 41 Continued from previous page. Wires to gas valve connected Correct. Replace wires if needed. w/continuity? Does main control Replace main control board assembly board (pwr board) (power board assembly). supply 12VDC to gas train? NOR000707A Replace gas train. www.norcold.com SERVICE MANUAL...
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Page 42: Fault Code - "No" "Ac" With Audible Alarm
Adjust clips to ensure fuse contacts are are making full contact with Clips okay? firm in clips and making full contact. fuse. Replace main control board assembly NOR000714A (power board assembly). www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 43: Fault Code - "Ac" "He" With Audible Alarm
Check AC heater wires connections connectors cannot be repaired, for loose or damaged okay? replace AC heater. connections Check AC heater resistance. Resistance Replace AC heater. See figure, below. 38-50 Ohms? Replace main control board assembly (power board assembly). NOR000715A-1 www.norcold.com SERVICE MANUAL... -
Page 44: Fault Code - "Dc" "He" With Audible Alarm
Possible Cause: NOR000721A The contacts of DC heater relay (K1 on the DC Board) are stuck closed. This fault can be displayed in ANY MODE. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 45: Fault Code - "Lo" "Dc
Correct the DC input voltage to the refigerator. Make sure the input voltage is 12.0 VDC. Alternately flashes “HI” and “dc” with an audible alarm. Possible Cause: The DC input voltage to the refrigerator is too high. www.norcold.com SERVICE MANUAL... -
Page 46: Fault Code - "No" "Dt" With Audible Alarm
Continuity? Replace the refrigerator. Reconnect the wire harness at main control board assembly (power board) and the user interface (optical display). NOR000796A Replace the main control board assembly (power board). www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 47: Fault Code - "Sr" With Audible Alarm
A flame is sensed at the burner when there should be none present. Possible Cause: The gas valve is “mechanically” stuck open. Therefore, the main control board (power board) senses a flame is pres- ent at the burner when there should be none www.norcold.com SERVICE MANUAL... -
Page 48: Fault Code - Flashing Temperature Setting
9.1 - 10.0 22.5 - 23.5 10.1 - 11.0 24.5 - 25.5 11.1 - 12.0 28.5 - 29.5 12.1 - 13.0 30.0 - 32.0 * Approximate values * Approximate values www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 49: Blank Display
(green) and P1-5 (white/violet). board (power board) (P1-12) and user interface (controls (P1-1). Check connection/continuity of white/violet wire between main control board (power board) (P1-9) and user interface (controls (P1-5). NOR000803A Call Customer Service. Replace user interface assembly. www.norcold.com SERVICE MANUAL... -
Page 50: Diagnostic Mode - N7Lx And N8Lx Models
The example shows the fin temperature to be 20°F. ■ If the thermistor is “open,” the second view will show “00”. ■ If the thermistor is “shorted,” the second view will show “99”. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 51: Screen 4: Stored Fault History
DC heater relay stuck open (no current) Not used Service required Not used error has occurred Flame is sensed. Thermister is sensed in range Not used Not used Not used Not used Not used www.norcold.com SERVICE MANUAL... -
Page 52: Screen 8. Power Board Outputs
16.0 VDC), LED segment 4 will be on. DC voltage higher than 16.0 volts Not used Not used DC voltage normal Not used Not used DC voltage lower than 8.0 volts www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 53: Cooling System Diagnostic Flowchart
Check heat input. Correct heat input device to Heat input device operating within meet specifications specification? Level refrigerator as outlined Refrigerator in Owner's Manual and operating leveled? specifications. NOR000797A Continued on following page. www.norcold.com SERVICE MANUAL Check condition of door gaskets. - Page 54 Unit is operating normally. setting for a period of 8-12 hours. normal Freezer -5°F to -10°F. Fin temperature 18°F to 25°F. Contact Customer Service NOR000797A www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL...
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Page 55: Wiring Schematic
Hold Switch Water Fill Switch Water Valve Line Test Point (120 VAC) Mold Heater Test Point Thermostat Test Point Neutral Test Point Motor Test Point 120VAC Valve Test Point 120VCA NOR000812A ICE MAKER* Fig. 16 - Wiring diagram www.norcold.com SERVICE MANUAL... -
Page 56: Wiring Pictorial
DC - 30A DC Heater Fuse Optional - - - - - Optional Chassis Ground ICE MAKER * Ice Maker Thermal Fuse Water Valve ICE MAKER* Fig. 17 - Wiring pictorial www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 57: Auxiliary Wiring Circuits
Condenser Fig. 19 - Cold weather heater only wiring Auxiliary Wire Harness P1-1 Auxiliary 12 VDC (ground) Cold Weather Heater P1-6 Auxiliary 12 VDC (positive) Cooling Unit P1-1 Auxiliary 12 VDC (ground) P1-6 Auxiliary 12 VDC (positive) www.norcold.com SERVICE MANUAL... -
Page 58: Fan And Cold Weather Heater
Auxiliary Wire Harness Cold Weather Heater Brown from Ice Maker P1-1 Auxiliary 12 VDC (ground) Cooling Unit P1-6 Auxiliary 12 VDC (positive) P1-1 Auxiliary 12 VDC (ground) P1-6 Auxiliary 12 VDC (positive) www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL... -
Page 59: Ice Maker And Fan
Fan Thermostat Fan Thermostat Condenser Condenser Cold Weather Heater Auxiliary Wire Harness Cooling Unit P1-1 Auxiliary 12 VDC (ground) Auxiliary Wire Harness P1-6 Auxiliary 12 VDC (positive) P1-1 Auxiliary 12 VDC (ground) P1-6 Auxiliary 12 VDC (positive) www.norcold.com SERVICE MANUAL... -
Page 60: Ice Maker
Ammonia ATTENTION and chlorine corrode brass and copper components. Using a leak checking solution, examine the gas supply line connections for leaks. No leaks are allowed. www.norcold.com Polar Series N7V, N7X, N7XL / N8V, N8X, N8XL...