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SERVICE MANUAL
(TROUBLE SHOOTING AND REPAIRING TIPS)
Fourth Edition – February 2006
CONSERV REFRIGERATOR
MODELS
375 / 1200 SERIES ( OLD & NEW)
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WARRANTY INFORMATION Your Equator appliance is protected by this warranty under normal, personal, family or household use (1 Year), and limited commercial use (90 days) in the USAand Canada. WARRANTY SERVICE WARRANTY Thiswarrantyisgivenby: EquatorCorporationundertakestotheconsumer-owner EquatorCorporation, to repair or, at Equator Corporation’s option, to replace EquatorPlaza, any part of this product which proves to be defective in 2801W.SamHoustonPkwy.N., workmanship or material under normal p
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2.
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1.1 Trouble-Shooting Chart Disturbance Cause Trouble-Shooting Remedy Unit does not Wall socket is dead. Check installation. Install new fuse if refrigerate or freeze, necessary. Inform user. compressor does not operate. Mains cable is See section 1.2: Trouble- Repair or replace socket defective. shooting in the electrical or mains cable. circuit. Thermostat is Replace thermostat. defective. Defective winding in See section 1.6: Trouble- Replace compressor. compressor. shooting for Electrical Fau
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Disturbance Cause Trouble-Shooting Remedy Oil present in system Question user about mode Let unit stand for several after horizontal of transportation and time hours at warm transport. interval between temperature and try to installation and start-up. start again. If compressor does not start, open the system and blow through with N2. Locked rotor (fault in Check that compressor If system (filter) is not compressor). hums and picks up total blocked, replace starting current. Open compressor. sys
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Disturbance Cause Troubleshooting Remedy Defective thermostat. 1.Turn thermostat knob to zero. 2.Compressor continues to run. 3.Dismount brown wire. 4.Check internal wiring 4.Compressor continues for short circuit (fast- to run. 5.Compressor freeze switch). 5.Replace stops. thermostat. Compressor starts Extremely high Measure voltage. Inform user. normally but stops voltage. again. High ambient Measure temperature and Improve ventilation. temperature. Poor check ventilation around ventilation. c
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Ditrubance Cause Trouble-shooting Remedy Check if blade is locked Fittings for fan or air mechanically. guiding duct are adjusted No-Frost or replaced. Check if blade is fixed Blade must turn so that correctly on shaft. air flow only can be sucked in and blown out in the right places. Blade must cover 10mm of shaft end, on two-step fan 14mm. Check id timer is set in Turn timer forward. No-Frost defrosting position. No-Frost Evaporator blocked Check for snug fit of doors, Repair leakage. Check by
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Disturbance Cause Trouble-shooting Remedy Ice blockage in Heat injection area on Blow N2 through system. capillary tube. evaporator with cloth Install outsize service with hot water. If filter. Ensure careful refrigerant now can be evacuation. Start heardtoflowmore compressor. Stop when quickly through the warm. Evacuate system system, ice blockage in again. With heavy capillary tube is indicated. contamination of system Alternatively, stop it is necessary to repeat compressor and let this proce
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Disturbance Cause Trouble-shooting Remedy Unit has recently been Question user about use Inform user about the filled with large of unit immediately prior problems caused by this. quantities of food. to service call. Instruct user about use of fast-freeze switch. Built-in thermometer Check for correct Replace built-in is defective. User’s thermometer readings. thermometer if necessary. thermometer is defective. Ambient temperature Symptoms resemble those Find amoresuitable is below 0°C. of parti
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1.2. Trouble-Shooting in the Electric Circuit. Before systematic trouble-shooting is commenced, check to ensure that: - The fuses are intact. - The correct voltage has been used (vo!trneter). - The electrical equipment used is suitable for the cam- pressOr. - The wiring has been correcUy installed (compare with wiring diagram as found in the spare parts list). - There is no leakage between the live parts and the frame (see Section 1.3). Example of wiring diagram: Diagram BKF, BMC, BSKF. 9.
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1.3. Checking for Leakage to Frame 1.4. Compressor Failure For checking whether there is leakage between the live parts Check whether voltage is being supplied to the unit. and the frame, the insulation resistance can be tested using an ohmmeter, megger or high-voltage testing device. PTC starting device with LST. An ohmmeter can be used for a rough check. When investigating the wires on the unit, a clamp from the Connect a voltmeter between terminals neutral and L on the ohmmeter is placed on t
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Starting device with HST 1.5. Trouble-Shooting for Electrical Faults in the Compressor Connect a voltmeter between terminals 10 and 13 on the start- Separate the starting device from the compressor and use an ing device. If no voltage can be measured, either the mains ohmmeter to test the main and start winding of the com- cable or the socket is defective. pressor. Connect the ohmmeter between “Run” and “joint” to deter- Connect a voltmeter between terminals 10 and 14 on the start- mine the resi
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1.6. The PTC Starting Device Universal PTC Starting Device It should be noted that starting device 1 03N001 2, which is used The relay 103N0015 is a universal relay, which can replace for the freezing compressor of refrigerator/freezer uprights, is the relays 103N0002, 103N0005, 103N0011, 103N0012 and installed differently than is starting device 1 03N001 1, which is 103N0016. used for the refrigerating compressor. 103N0002 103N0005 103N0011 103N0012 103N0016 On starting device 1 03N001 2, the N
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1.7. Using a Manometer in Trouble-Shooting The pressure in a refrigerating system is directly dependent on the temperature. For this reason, the manometer can indicate both temperature in degrees Celsius and pressure in bar. By mounting a manometer on the suction side of the compres- sor ~process ppe~. the temperature in the evaporator at which the refrigerant evaporates can be read. This temperature is normally from -15 C to -25 C in a refrigerator and from -3CC to -35 C in a freezer. These tem
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Examples of trouble-shooting using a manometer on the suc- tion side (process pipe) and a service valve: 3. Leakage in the system. The manometer indicates insufficient suction pressure. 1. The system is blocked. The pressure equalizing time is short. The equalizing pressure is lower than would be expected. Ensure that the equalizing pressure is sufficient for leak The suction pressure is very low. Pressure equalizing takes place very slowly or not at all. detection. Cause: Ice blockage in the ca
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2. MAKING REPAIRS TO THE REFRIGERATING The system can then be blown through with nitrogen (see sec- SYSTEM tion: The Blowing Process). The valve is closed at the filter drier (see figure 3), the hose is dismounted and mounted on 2.1. Opening the Refrigerating System with Refrige- the vacuum pump outlet on the oil separator - see figure 4. rant R600a (Isobutane) for Repairs Connect the hose of the filling station to the valve on the filter drier and open the valve - see figures 5 and 6. The Possi
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Actual Evacuation After mounting of the filling hose, the system is ready for the actual evacuation. Evacuate until a stable vacuum of 1 mbar has been reached. Check for stability of the vacuum by closing the valve for the vacuum pump (12). If the vacuum gauge needle falls appreciably, possible leakage in the system is indicated. When a stable vacuum of 1 mbar has been reached, evacute further 5-10 minutes, close the valve for the vacuum gauge (10) and the vacuum pump (12) and the spherical valv
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First Evacuation of Appliances with R600a in the System 4. Mount the hose on the vacuum pump outlet. 5. Mount the hose for the filling station on the valve for the 1. Drilling and tapping of filter drier, after thorough cleaning filter drier. where the gasket of the tongs must be tight. 6. Open the valve and start evacuation. 2. Mount the hose - open the valve. The system can then be 7. After the first evacuation, close the valves at the filter drier blown through with nitrogen (see section: The
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The Blowing Process of the System. the Filling Sta- tion and the Vacuum Pumo and Opening of the Sys- tem 10. Open the valve for the filling station (11). 7. Drilling and tapping of the process pipe. 11. Slowly open the valve for the vacuum pump (12) 8. Connect dry nitrogen and equalize the pressure in and blow the system, the filling station and the the system. vacuum pump through. 9. Open the valve on the tongs at the filter drier and 12. The system can then be opened with capillary the spheric
