{"id":28,"date":"2021-12-17T11:28:11","date_gmt":"2021-12-17T02:28:11","guid":{"rendered":"https:\/\/filter-pump.nopgroup.com\/eng\/wordpress\/?page_id=28"},"modified":"2022-03-30T04:22:33","modified_gmt":"2022-03-29T19:22:33","slug":"troubleshooting","status":"publish","type":"page","link":"https:\/\/filter-pump.nopgroup.com\/eng\/troubleshooting\/","title":{"rendered":"FAQ"},"content":{"rendered":"\n

Symptom<\/h2>\n\n\n\n
\n
No discharge from outlet port.\/Insufficient flow or pressure.\/Abnormal noise.<\/span><\/i><\/i><\/span><\/div>
\n

Possible Causes<\/strong><\/p>\n\n\n\n

\n
Motor failure.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Are wires at motor loose or disconnected?
Do operation test for motor individually.<\/td><\/tr>
Possible Remedies<\/td>Repair or replace motor.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n
Motor is wired incorrectly or disconnected.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Are wires at motor loose or disconnected?
Check direction of rotation.<\/td><\/tr>
Possible Remedies<\/td>Rewire motor in a correct rotation indicated on label.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Coupling is damaged.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check connected area between pump and motor.<\/td><\/tr>
Possible Remedies<\/td>Replace coupling.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Insufficient liquid level.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check liquid level in the tank.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Add enough liquid.
\u00b7Control liquid level with level sensor.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Inlet port is clogged.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check the inlet port for clogging.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Periodical cleaning around inlet port.
\u00b7Insert a plate filter prior to the inlet port as a
\u201cpre-filtration device.\u201d<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Turbulence filter is clogged.
*Only applies to YTH-EP and ES.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>\u00b7Does pump deliver liquid from contaminant drain port?
\u00b7Is there abnormal noise?
\u00b7Is there tramp oil?<\/td><\/tr>
Possible Remedies<\/td>\u00b7Perform backwashing.
(Please be sure to read the instruction manual.)
\u00b7Take measures to prevent suction of air or tramp oil.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Impeller is clogged with sludge, pump failure.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check for impeller clogging and damage.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Remove sludge.
\u00b7Repair or replace pump.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Air drawn into pump or pipes.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>After long storage or right after replacing coolant, pump may not
discharge properly due to the air trapped inside the pump.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Perform air-bleeding on pump or piping.
\u00b7If there is a check valve in outlet line, do it right before the one.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Pump failure or wear.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>\u00b7Does motor rotate?
\u00b7Are viscosity and lubricity adequate?
\u00b7Is there abnormal noise?<\/td><\/tr>
Possible Remedies<\/td>Repair or replace motor.
Change the types of coolant you use.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Cavitation, Aeration.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Is pump sucking foam or air?<\/td><\/tr>
Possible Remedies<\/td>Take measures to prevent suction of air or tramp oil.
(ex. Change pump location, use partition or
anti-foaming agent.)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Outlet port size is too big.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Is outlet flow sufficient as specified?<\/td><\/tr>
Possible Remedies<\/td>Replace with smaller port.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Relief valve pressure setting.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Does pressure build up when tightening the relief valve\u2019s
pressure control screw?<\/td><\/tr>
Possible Remedies<\/td>Tighten up the relief valve\u2019s pressure control screw to the
required level.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Relief valve fixing.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Does pressure not build up when tightening the relief valve\u2019s
pressure control screw?<\/td><\/tr>
Possible Remedies<\/td>\u00b7Repair or replace relief valve.
\u00b7Remove tramp oil.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n
No discharge from contaminant drain port.<\/span><\/i><\/i><\/span><\/div>
\n

Possible Causes<\/strong><\/p>\n\n\n\n

\n
Contaminant drain port piping is too long or too high.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Take off a pipe from the contaminant drain port and check if liquid
is properly being delivered or not.<\/td><\/tr>
Possible Remedies<\/td>Piping must be no higher than 1 m from the tank bottom vertically,
and no longer than 3 m horizontally.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n
Clogging of contaminant drain port.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check the clogged area in the pipeline.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Clean inside the pipe periodically.
\u00b7Minimize the number of bends in piping.
\u00b7Replace with larger port.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
Clogging or failure of suction impeller.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Check the suction impeller for clogging or damage.<\/td><\/tr>
Possible Remedies<\/td>\u00b7Remove accumulated sludge.
\u00b7Repair or replace pump.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n
Liquid leaks.<\/span><\/i><\/i><\/span><\/div>
\n

Possible Causes<\/strong><\/p>\n\n\n\n

\n
Oil seal is deteriorated or damaged.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Does liquid leak from near the coupling connected area?<\/td><\/tr>
Possible Remedies<\/td>Repair or replace pump.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n
Gasket is deteriorated or damaged.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Does liquid leak from connected area?<\/td><\/tr>
Possible Remedies<\/td>Repair or replace pump.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n
Breaker or thermal trips out.<\/span><\/i><\/i><\/span><\/div>
\n

Possible Causes<\/strong><\/p>\n\n\n\n

\n
\u00b7Motor failure.
\u00b7Wiring errors.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>\u00b7Check motor wiring.
\u00b7Does motor start?<\/td><\/tr>
Possible Remedies<\/td>\u00b7Rewire motor.
\u00b7Repair or replace motor.<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/div><\/div>\n\n\n\n
Overloading.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>Are motor output rating and liquid viscosity adequate?<\/td><\/tr>
Possible Remedies<\/td>\u00b7Use motor with higher output rating.
\u00b7Use pump with lower capacity.
\u00b7Lower the pressure setting.
\u00b7Change the coolant types.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n\n\n\n
\u00b7Coolant type is incompatible. (Viscosity is too high or insufficient lubricity.)
\u00b7Pump failure.<\/span><\/i><\/i><\/span><\/div>
\u30b9\u30af\u30ed\u30fc\u30eb\u3067\u304d\u307e\u3059 <\/i><\/span><\/div>\n
Check Methods<\/td>\u00b7Is motor rotating?
\u00b7Are liquid viscosity and lubricity adequate?
\u00b7Is there abnormal noise?<\/td><\/tr>
Possible Remedies<\/td>\u00b7Repair or replace pump.
\u00b7Change the types of coolant you use.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
Please feel free to contact us<\/span><\/a><\/div>\n\n\n\n\n","protected":false},"excerpt":{"rendered":"

Symptom<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"swell_btn_cv_data":"","footnotes":""},"class_list":["post-28","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/pages\/28","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/comments?post=28"}],"version-history":[{"count":2,"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/pages\/28\/revisions"}],"predecessor-version":[{"id":3435,"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/pages\/28\/revisions\/3435"}],"wp:attachment":[{"href":"https:\/\/filter-pump.nopgroup.com\/eng\/wp-json\/wp\/v2\/media?parent=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}