E5 - 老板电器 洗碗机

中文

含义

加热器故障。洗碗机加热管无法正常加热，或检测到加热电流异常、加热继电器不动作。

常见原因

1. 加热管（发热管）内部电热丝烧断（开路）
2. 加热管表面水垢过厚导致热交换效率极低
3. 加热继电器触点粘连或烧损
4. 加热管供电线束插头松动或烧蚀
5. 温度保险丝（热熔断器）熔断
6. 主控板加热驱动可控硅/继电器驱动电路损坏

自助排查

1. 断电后检查加热管插头是否插紧，有无烧焦痕迹
2. 用万用表电阻档测量加热管两端阻值——正常约20~50Ω（视功率而定），无穷大则开路
3. 测量加热管对地绝缘电阻，若低于1MΩ则需更换（漏电风险）
4. 检查底部温度保险丝是否导通，若断开则需同时排查过热原因
5. 加热管结垢严重需清洗或更换，同时建议使用软水或洗碗机专用盐

English

Meaning

Heater failure. The dishwasher heating element cannot heat properly, or the main control detects abnormal heating current or a non-responsive heating relay.

Common Causes

1. Open heating element (burned-out resistance wire)
2. Thick scale buildup on the heating element drastically reducing heat transfer
3. Welded or burnt heating relay contacts
4. Loose or burnt heater power harness connector
5. Blown thermal fuse (thermal cutoff)
6. Failed triac or relay drive circuit on the main control board

Self-Check Steps

1. Power off, check the heater connector for tightness and signs of burning
2. Use a multimeter to measure heater resistance — typically 20–50 Ω depending on wattage; infinite reading indicates an open circuit
3. Measure insulation resistance from the heater terminal to ground — replace if below 1 MΩ (shock hazard)
4. Check the thermal fuse at the base for continuity; if open, investigate the overheating cause before replacing
5. Heavy scale requires heater cleaning or replacement; use rinse aid and dishwasher salt to prevent recurrence