Error code

Mitsubishi Electric CMB code 2134

No approved translation for this record yet; showing the original text.

Meaning

Abnormal water temperature: 1. If the inlet water temperature 5°C is detected to be below or 50°C over during operation (the first time it is detected), the heat source unit is stopped temporarily, the system enters the 3-minute restart prevention mode, then restarts the heat source unit after 3 minutes. 2. If the inlet water temperature 5°C is detected to be below or 50°C over again within 30 minutes after the heat source unit stops following the operation in 1 above, (the second time it is detected), an abnormal stop is

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Possible causes

(1) Failure of the heat source water circulating pump to operate. (2) Cooling tower or heating equipment out of order. (3) Clogged or dirty water heat exchanger. (4) Faulty thermistor. (TH6) (5) Faulty thermistor input circuit on the control board. (6) Faulty thermistor installation. (TH6)

Solution

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