Haier BD-478A service manual Test method and instrument, Temperature with load

temperature with load.

Type tests include items (1), (2), (8), (9), (10), (13), (17), (18), (20), (21) and the followings: (22) total effective volume; (23) ice producing ability; (24) frost melting performance; (25) heat insulation performance and anti dew;

(26)gas tightness of door seal; (27) duration of door bar and handle; (28) strength of supporting bracket and similar parts; (29) internal freezer material and smell; (30) firmness of freezer and transportation test.

12.8.2 Test method and instrument

12.8.2.1 Sealing performance test of refrigeration system

In this test, freezer is put to positive pressure room, temperature is 16-32℃. Leakage inspection instrument is set to 0.5g of yearly leakage, check every position of refrigeration system. Leakage at any point shall not greater than 0.5g. Leakage inspection instrument normally used includes H-25 of American GE product and Halogen instrument HLD4000 made by a German company.

12.8.2.2 Insulation resistor

This test is to check the insulation performance of freezer. The resistance is measured with a voltage of 500V DC added to live parts and accessible metal parts. The resistance must be not less than 2 million ohm.

MAINTENANCE SERVICE AND TROUBLE SHOOTING

Maintenance Service and Trouble Shooting

12.8.2.3 Electrical intensity

This test is to check the electrical intensity of live parts and all accessible metal parts. The testing equipment is flashover and breakdown unit,

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