LHH-320A is the circuit board inside the top-floor inspection box of Mitsubishi machine-room-less lifts, the box usually coded KCE-901B. It carries the inspection switches and the MON1 / MON0 selectors used to read the fault display at the top landing, so a fault here shows as a dead display or switches that do nothing. LHH-321A and LHH-322A look alike but serve other box versions. Match the code on the old board before ordering.
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Other boards of the same inspection series, and the boxes they are fitted in.
LHH-32X inspection box boards:
Inspection boxes and related LHH boards:
Potensi supplies the Mitsubishi elevator inspection box board LHH-320A, the Mitsubishi elevator inspection PCB board and the Mitsubishi lift PCB board range around it. The models above are only a part of what we can supply. We stock and source a much wider range of related and alternative models. If your model number is not listed here, please send us the model number or a photo of the original part, and we will confirm availability and the correct match for you.
Q1: Where is the LHH-320A fitted?
A: It is the board inside the top-floor inspection box of a machine-room-less Mitsubishi lift, the box mounted at the top landing. The box is usually coded KCE-901B, and the board sits behind its cover. Because it is reached from the landing, it is the board a fitter uses before entering the shaft.
Q2: What are the MON1 and MON0 switches for?
A: They are the selectors used to read the fault display on this board. Turning them to different positions shows fault codes and stored data on the display, which is how the lift is interrogated without the machine room. If the display shows nothing while the supply is present, the board itself becomes the suspect.
Q3: Is it the same as LHH-321A or LHH-322A?
A: No. They belong to the same inspection series but serve different box versions. The three codes are listed together by suppliers because they are ordered together, not because one replaces another. Read the code printed on your old board and match it exactly.
Q4: Does it fit every Mitsubishi machine-room-less lift?
A: Only the versions that use the KCE-901B box with this board. Mitsubishi built several inspection box generations, and the board inside each one differs. Send us the box code and the board code together, and we will tell you whether this one is right.
Q5: The display is dead or the switches do nothing. Is the board finished?
A: Check the supply and the plug at the back of the box first, since a loose connector gives the same symptom. Look at the switch contacts and the ribbon as well, because a bent pin stops the selectors from registering. If the supply and the connections are sound and the display stays dark, replace the board.
Q6: What should I send before ordering?
A: A clear photo of the old board with the code readable, front and back. A photo of the inspection box label carrying the KCE code. The quantity you need, since these boxes are often replaced in pairs on a site.
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