Mitsubishi MJ-EZ6CX-S1-IT, Service Manual, Page: 26 / 50

● Start … Press the mode switch and dehumidifying switch when power is off.
Turn on the power with those switches pressed.
● Operational content
① Dehumidifying operation (High)
②
Heater turns on immediately.
③
Humidity sensor check mode starts.
④
Louvre speed 243pps (high speed mode)
⑤
Detection of room temperature anomaly is released.
⑥ Determining the detection of temperature anomaly of heat exchanger and heater once for all
⑦ When an error occurs, the indications shown in “ 3) Error Indications and Corrective Actions”
are displayed.
4) Self Diagnostic Test Program
5) Demo Program
6) Error History Display
● Start … Press the mode switch and the dehumidifying switch 7 times together when power is off.
Turn on the power within 2 seconds.
Alternatively, turn on the power with the swing louvre switch pressed.
● Operational content … operation without heater continuity
● Release … Remove the power plug.
● Start … Press the mode switch and the dehumidifying switch 9 times together when power is off.
Turn on the power within 2 seconds.
● Mode selection … Change to the diagnosis mode with the mode switch.
History1(newest) → History2 → History3 → History4 → History5 → History6 → History7
→ History8 →
(History1)
● Release … Turn off the power.
● Release… Turn off the power.
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