103
THE CAUSE OF THE
ABNORMALITY CANNOT
BE FOUND BECAUSE
IT IS
NOT RECUR
Check the outdoor unit
POWER LAMP
Check the table of the outdoor unit
FAILURE MODE RECALL
function.
Unit does not operate in Cool or
Heat mode.
Refer to Service Manual:
“Check of R.V. Coil”
At least one
fo the
LEDs
BLINKS
Both the
LEDs are
ON
FAILURE MODE RECALL M SERIES
- MULTISPLIT
Check the power supply
Both the
LEDs are
OFF
Frost or Overheat of turned off
indoor unit heat exchanger.Refer to
Service Manual: “Check LEV”
Issues of abnormal dew
condensation, check the pipes.
In Heat Mode, the indoor unit does
not heat the room. Refer to Service
Manual: “How to check inverter/
compressor”, Check pipes.
In Cool Mode, the indoor unit does
not cool the room. Refer to Service
Manual: “How to check inverter/
compressor”, Check the pipes
Serial signal from outdoor unit.
Refer to Service Manual:
“How to check miss wiring and serial
signal error”
MITSUBISHI ELECTRIC
/ DIAGNOSTIC
Содержание M-SERIES
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