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Problem£ºMotor does not work Cause 1£ºPower supply was cutted off, plug failed or loosed Remedy£ºCheck the power supply, check the plug and switch. Cause 2£ºCarbon brush jammed, or escaped from the commutator. Remedy£ºResetting the carbon brush. Cause 3£ºPRCD protection works Remedy£ºPress ¡°RESET¡± button on the PRCD. Cause 4£ºPRCD goes wrong Remedy£ºChange PRCD Problem£ºDrilling slowly Cause 1£ºDrill bit worn out Remedy£ºChange drill bit Cause 2£ºFeeding pressure too low Remedy£ºUse greater pressure Cause 3£ºDrill bit segment were pasted by the chips Remedy£ºClean drill bit with enough water supply. Cause 4£ºToo high speed Remedy£ºChange to the next lower gearstep Cause 5£ºDriling through iron reinforcements Remedy£ºUse a greater pressure and next lower gear. Cause 6£ºToo much chip in the bore hole. Remedy£ºClean the bore hole with enough water supply. Cause 7£ºLess water supply or water leakage. Remedy£ºCheck the ball valve, check the water flow. Cause 8£ºDrill bit becoming glazed Remedy£ºResharpen the drill bit again by SiC grindstone. Problem£ºDrill bit jam Cause 1£ºRebar chip or concrete block was jammed between the tube and the core or the hole wall. Remedy£ºSwitch the machine off, loosen the drill bit by turning right and left using a suitable wrench. Cause 2£ºRig fixing not steady enough, it goes out of the original positon. Remedy£ºRefixing the rig. Cause 3£ºToo much gap between the column and the carriage. Remedy£ºAdjust the gap to better condition. Problem£ºDrill bit under- cutting Cause 1£ºDrilling spindle does not straight Remedy£ºRepair or change the spindle Cause 2£ºDrill bit does not straight Remedy£ºChange the drill bit Cause 3£ºAbrasive chip can not be flushed out Remedy£ºSet enough water supply. Problem£ºWater supply bush leakage Cause£º Rotary shaft seal worn out Remedy£ºChange the rotary shaft seal ¡¡ |
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