1. Absorption Technology SANYO Electric Co.,Ltd.

2. Trouble Shooting Data8-2 TROUBLE Chiller does not run Chilled water temp is high Generator alarm Combustion alarm Water alarm Motor alarm System alarm

3. Trouble Shooting / Chiller does not run Data8-3 TROUBLE Chilled water temp is high Generator alarm Combustion alarm Water alarm Motor alarm System alarm Chiller does not run

4. Blower motor runs but combustion does not start Trouble Shooting / Chiller does not run Gas control valve moves The motor moves to full open then stops.After that no more moving Protect relay is out of order The motor is out of order Check if the air flow switch is ON Check setting of air flow switch Setting of 33LO is shifted incorrectly Setting of 33H is shifted incorrectly After full open position, the motor moves to full close then stops.After that no more moving Protect relay is out of order The motor is out of order Check if the air flow switch is ON Check setting of air flow switch Setting of 33LO is shifted incorrectly Setting of 33L is shifted incorrectly Gas control valve does not move Protect relay is out of order Setting of 33H or 33L is shifted incorrectly The motor is out of order Data8-4

5. Trouble Shooting / Chiller does not run The motor is out of order Check 43AB if the switch is turned to run If SOLUTION LEVEL alarm occured at start-up, blower does not run Contact of the air flow switch is welded Check if the motor is in full close.There is a case that the motor stops in half way position after power failure Protect relay is out of order Check if chilled water pump interlock signal come to the microprocessor Check if cooling water pump interlock signal come to the microprocessor Check if ventilation fan interlock signal come to the microprocessor Fuse is blow-out Interlock Blower motor does not run Data8-5

6. Trouble Shooting / Chilled water temp is high Data8-6 TROUBLE Chiller does not run Combustion alarm Generator alarm Motor alarm Water alarm System alarm Chilled water temp is high

7. Trouble Shooting / Chilled water temp is high The motor is out of order Vacuum problem Generating hydrogen gas Air leakage Insufficient air purging Chilled water problem Chilled water flow rate is too much Inhibitor is insufficient Pd.cell is out of order Pd.cell heater is out of order Data8-7

8. Trouble Shooting / Chilled water temp is high The motor is out of order Cooling water problem Flow rate is inadequate Cooling water temp is too high Partition plate in water box is removed Absorber and condenser tubes are fouled Cooling water pump control malfunction Strainer is clogged Air is existing in cooling water line Ambient temperature and/or humidity are too high Cooling water control valve malfunction Cooling water sprinkling condition is bad Cooling tower fan malfunctions Cooling tower fan belt is broken Cooling water temp control thermostat malfunction Data8-8

9. Trouble Shooting / Chilled water temp is high Solution problem Absorbent flow rate is insufficient Refrigerant amount is insufficient Alcohol is insufficient Contamination of refrigerant Solution flow rate is not adjusted properly Heat exchanger is clogged with foreign materials Cooling water inlet temperature is too low Refrigerant blow down is needed Foaming condition in high temp generator is violent due to contamination of absorbent solution with foreign material Wrong inverter setting Check valve malfunctions Wrong damper adjustment Heat transfer tubes of high/low temp heat exchangers leaks Data8-9

10. Trouble Shooting / Chilled water temp is high The motor is out of order Crystallization Combustion problem #1 absorbent pump cavities Ambient temperature is too low Cooling water inlet temp is too low with insufficient air purging and vacuum condition is not good Gas flow rate is insufficient R-up set is too low Air/gas linkage is shifted to low fire Gas supply pressure fluctuates Chilled water temperature setting is too high Chilled water temp. sensor is out of order Solution flow rate is not adjusted properly Cooling water inlet temp fluctuates violently Vacuum condition in the chiller is bad Absorbent solution is insufficient Alcohol is insufficient Microprocessor is out of order Data8-10

11. Trouble Shooting / Chilled water temp is high The motor is out of order Electric problem Parts,setting position Solution level electrode malfunction Wrong setting on microprocessor and inverter Electric parts & sensors are broken Wrong position of select switches Electrode is contaminated Teflon tube is removed from the electrode Electrode is dropped down Data8-11

12. Trouble Shooting / Generator alarm Data8-12 TROUBLE Chilled water temp is high Chiller does not run Combustion alarm Water alarm Motor alarm System alarm Generator alarm

13. Trouble Shooting / Generator alarm The motor is out of order Vacuum problem Hydrogen gas is generated Pd cell heater is broken Inhibitor is inadequate Pd cell is out of order Air leakage Purging is inadequate Data8-13

14. Trouble Shooting / Generator alarm The motor is out of order Cooling water problem Flow rate is inadequate Cooling water temp is too high Partition plate in water box is removed Absorber and condenser tubes are fouled Cooling water pump control malfunction Strainer is clogged Air is existing in cooling water line Ambient temperature and/or humidity are too high Cooling water control valve malfunction Cooling water sprinkling condition is bad Cooling tower fan malfunctions Cooling tower fan belt is broken Cooling water temp control thermostat malfunction Data8-14

15. Trouble Shooting / Generator alarm Absorbent flow problem Absorbent flow rate is inadequate L.T.G. tubes are broken Wrong adjustment Orifice provided in the pipe between L.T.G. and condenser is clogged Heat exchanger(s) tubes are broken Cooling water temperature is too low Refrigerant blow down is inadequate Foaming condition of absorbent in H.T.G is violent due to the fact that foreign material exists in the absorbent Wrong inverter setting Check valve malfunctions Damper setting is not proper Heat exchanger(s) is (are) clogged Refrigerant is contaminated by absorbent solution Data8-15

16. Trouble Shooting / Generator alarm The motor is out of order Crystallization #1 absorbent pump cavities Ambient temperature and/or humidity are too high Cooling water control valve malfunction Cooling water sprinkling condition is bad Cooling tower fan malfunction Cooling tower fan belt is broken Ambient temperature is too low Cooling water temperature is too low Data8-16

17. Trouble Shooting / Generator alarm The motor is out of order Electric parts problem Microprocessor malfunction Cam switches malfunction Pressure switch malfunction Solution level relay malfunction Temperature sensor malfunction Elec.parts/sensor malfunction Solution level electrodes malfunction Surface of electrode is contaminated Electrode is broken Teflon tube put on electrode is removed Data8-17

18. Trouble Shooting / Generator alarm The motor is out of order High Temperature generator problem Wrong combustion adjustment Suction of blower is clogged -> Air/gas ratio get warped Flue is clogged -> Air/gas ratio get warped Air is existing in cooling water line Air is existing in cooling water line Baffles provided in smoke tube are broken Combustion chamber & smoke tube are sooted Over gas input Gas pressure increases Wrong gas burner linkage Data8-18

19. Trouble Shooting / Combustion alarm Data8-19 TROUBLE Chiller does not run Chilled water temp is high Generator alarm Motor alarm Water alarm System alarm Combustion alarm

20. Trouble Shooting / Combustion alarm The motor is out of order Flame failure Spark Good Flame failure occurs after finish of ignition spark (Pilot burner does not ignite) Protect relay is out of order Pilot burner is not adjusted properly Air is existing in cooling water line Air is existing in cooling water line Pilot solenoid valve is out of order Pilot gas regulator is out of order Flame detector (UV tube) is out of order Data8-20

21. Trouble Shooting / Combustion alarm The motor is out of order Flame failure Spark Good Flame failure occurs at main flame trial Air is existing in cooling water line Pilot burner ignite Pilot burner is not adjusted properly Protect relay is out of order Main gas regulator is out of order Flame detector can not detect flame Main gas shut-off valve is out of order Gas supply pressure fluctuates Flue is clogged Protect relay is out of order Pilot burner is OK Flame failure occurs after a while of main flame ignition Main burner does not ignite Main gas regulator is out of order Gas flow mater is locked Flue is clogged Voltage drops Protect relay is out of order Check if test cock opens or not Check if gas/air linkage is loosening or not Main gas shut-off valves is out of order Gas/air linkage is not adjusted properly Data8-21

22. Trouble Shooting / Combustion alarm The motor is out of order Ignition transformer is out of order Microprocessor is out of order Air is existing in cooling water line Position of spark rod is not adjusted properly Insulation of spark rod is out of order Ignition spark wire is removed or is broken Protect relay is out of order Flame detector is out of order The motor is out of order Flame remains after stop of combustion Data8-22 Flame failure Spark No Good

23. Trouble Shooting / Combustion alarm Gas pressure alarm Check gas regulator in main gas pipe Air is existing in cooling water line Check gas pressure switch Confirm function of the switch Check the setting Check gas strainer Check other equipment installed in main gas train Measure gas supply pressure Check gas pressure regulator installed in main gas train Data8-23

24. Trouble Shooting / Combustion alarm Air flow alarm Measure pressure inside of wind box Check the setting Confirm air flow switch Check tube between box and air flow switch if the tube is clogged by foreign materials or not Check suction of the wind box whether suction is clogged by foreign materials or not Check contact of air flow switch Check if air flow switch is mounted properly Data8-24

25. Trouble Shooting / Water alarm Data8-25 TROUBLE Chilled water temp is high Chiller does not run Combustion alarm Generator alarm System alarm Motor alarm Water alarm

26. Trouble Shooting / Water alarm Water system Temperature Holding water quantity in a chilled water piping is too little Flow rate Too low leaving chilled water temp. Too low entering cooling water temp. Too high leaving hot water temp. Check chilled water flow switch Wrong operating order (In case of manual operation) Temp. control function does not work properly Ambient temperature is too low Cooling water temp control malfunctions Wrong operating order (In case of manual operation) Temp. control function does not work properly Check if valves in water system are opened properly Check if a strainer in water system is clogged or not Check if air is existing in water system or not Data8-26 Holding water quantity in a chilled water piping is too little Check chilled water pump condition

27. Trouble Shooting / Water alarm Electric system Microprocessor Interlock Check wiring and electric parts of interlock wiring Flow switch Electric parts malfunction Temperature sensor Auxiliary relay in chiller control panel Data8-27

28. Trouble Shooting / Motor alarm Data8-28 TROUBLE Chiller does not run Chilled water temp is high Generator alarm System alarm Combustion alarm Water alarm Motor alarm

29. Trouble Shooting / Motor alarm Absorbent pump Measure operating amperage Over-current Crystallization or foreign material is exiting in the pump Open phase Pump motor is out of order Magnet contactor is out of order Coil of pump motor is out of order Cause is in power supply Motor Magnet contactor with thermal relay Electric wires for the pump Measure insulation resistance Check the setting of thermal relay Data8-29

30. Trouble Shooting / Motor alarm Refrigerant pump Measure operating amperage Over-current Open phase Pump motor is out of order Magnet contactor is out of order Coil of pump motor is out of order Cause is in primary power Motor Magnet contactor with thermal relay Electric wires for the pump Measure insulation resistance Check the setting of thermal relay Foreign material is existing in the pump Data8-30

31. Trouble Shooting / Motor alarm Blower motor Measure operating amperage Over-current Open phase Pump motor is out of order Magnet contactor is out of order Coil of pump motor is out of order Cause is in primary power Motor Magnet contactor with thermal relay Electric wires for the pump Measure insulation resistance Check the setting of thermal relay Data8-31

32. Trouble Shooting / System alarm Data8-32 TROUBLE Chiller does not run Chilled water temp is high Generator alarm Combustion alarm Water alarm Motor alarm System alarm

33. Trouble Shooting / System alarm System alarm (Interlock) Check if chilled water pump interlock signal comes to the microprocessor The motor is out of order Check if cooling water pump interlock signal comes to the microprocessor Check if ventilation fan interlock signal comes to the microprocessor Data8-33