Mitsubishi Heavy Industries FDT Series Technical Manual page 426

(b) SRK series
Error code
None
Remote controller:
3.
•
•
Note:
RUN light TIMER light
Indoor
display – –
Green LED Red LED
Outdoor
control PCB
Stays OFF
Check the indoor unit fan operation.
Check the temperature differnce
between return and supply air.
Is the
temperature differnce
between return and supply air
10-20 ◦ C at
cooling?
NO
Is the compressor
operating?
message is displayed (for 3 seconds) when
performing cooling, defrosting and heating
YES
Is the
compressor rotation
speed low?
YES
Check which control "Determination
control of conpressor rotation speed" or
"Protective control by controlling
compressor rotation speed" is appropriate
to this phenomenon.
(1)
Are the
temperature conditions
of room and outdoor air close
to the rated
conditions?
Note (1) Outdoor: 35°C, Indoor: 27°C
NO
The unit is operating normally but is
operating under the contol for protecting
compressor or other respective parts.
- 425
Content
Operates but does not cool
Does the
heat load increase after
YES
installtion?
YES
Mistake in model selection.
Calculate heat load once more.
NO
" WAIT "
YES
operations from the remote
controller.
NO
YES
-
'12 • PAC-T-173
NO
reset.
NO
•