Inverter Heat Pump - Mitsubishi Electric M Series Manual

M series
C.1.8.2 Inverter Heat Pump
MSZ-FD25VA MSZ-GE22VA
MSZ-FD25VAS MSZ-GE25VA
MSZ-FD35VA MSZ-GE35VA
MSZ-FD35VAS MSZ-GE42VA
MSZ-FD50VA MSZ-GE50VA
MSZ-FD50VAS
Failure mode recall function
Outline of the function
This air conditioner can memorize the abnormal condition which has occurred once.
Even though LED indication listed on the troubleshooting check table disappears, the memorized failure details can be recalled.
This mode is very useful when the unit needs to be repaired for the abnormality which doesn't recur.
Flow chart of failure mode recall function for the indoor/outdoor unit
Operational procedure
The cause of abnormality cannot be found because the abnormality does not recur.
Setting up the failure mode recall function
Turn ON the power supply.
<Preparation of the remote controller>
While pressing both OPERATION SELECT button and TOO COOL button (MSZ-FD,
MSZ-GE22/25/35/42/50, MSZ-HC)/TEMP
the remote controller at the same time, press RESET button.
First, release RESET button.
And release the other two buttons after all LCD in operation display section of the
remote controller is displayed after 3 seconds.
Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature
is displayed) with the remote controller headed towards the indoor unit. 1
Does POWER (MSZ-FD)/ the upper (MSZ-GE,
MSZ-HC) /the left (MSZ-SF) lamp of OPERATION
INDICATOR lamp on the indoor unit blink at the
interval of 0.5 seconds?
Blinks: Either indoor or outdoor unit is abnormal.
Beep is emitted at the same timing as the
blinking of POWER (MSZ-FD)/the upper
(MSZ-GE, MSZ-HC)/the left (MSZ-SF)
lamp of OPERATION INDICATOR lamp.
Judgment of indoor/outdoor abnormality
Before blinking, does POWER (MSZ-FD)/ the
upper (MSZ-GE, MSZ-HC)/the left (MSZ-SF)
lamp of OPERATION INDICATOR lamp stay
ON for 3 seconds? Stays ON for 3 seconds
(without beep): The outdoor unit is abnormal.
The indoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the indoor unit
failure mode table.
Make sure to check at least 2 consecutive blinking cycles.
Releasing the failure mode recall function
Release the failure mode recall function by the following procedures.
Turn OFF the power supply and turn it ON again.
Press RESET button of the remote controller.
Repair the defective parts.
Deleting the memorized abnormal condition
After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall
function" mentioned above.
Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed)
with the remote controller headed towards the indoor unit.
Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted.
Release the failure mode recall function according to "Releasing the failure mode recall function"
mentioned above.
NOTE: 1. Make sure to release the failure mode recall function once it is set up, otherwise the unit cannot operate properly.
2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized.
2. Blinking pattern when the indoor unit is abnormal:
Blinking at 0.5-
second interval
2.5-second OFF
ON
OFF
Beeps
Repeated cycle
3.Blinking pattern when the outdoor unit is abnormal:
2.5-second OFF 3-second ON
ON
OFF
No beep
Repeated cycle
MSZ-GE60VA
MSZ-GE71VA
button (MSZ-GE60/71, MSZ-SF) on
1 Regardless of normal or abnormal condition,
a short beep is emitted once the signal is
received.
No (OFF)
2
Yes (Blinks)
Yes
No
2
Blinking at 0.5-
second interval
2.5-second OFF
Beeps
Repeated cycle
Blinking at 0.5-
second interval 2.5-second OFF
Beeps
WALL-MOUNTED Inverter Heat Pump
MSZ-HC25VA MSZ-SF15VA
MSZ-HC35VA MSZ-SF20VA
MSZ-HC35VAB
MSZ-FD
Indoor unit is normal.
But the outdoor unit might be abnormal be-
cause there are some abnormalities that can
not be recalled with this way.
Confirm if outdoor unit is abnormal according
to the detailed outdoor unit failure mode recall
function.
The outdoor unit is abnormal.
Check the blinking pattern, and confirm the abnormal point with the
outdoor unit failure mode table.
Make sure to check at least 2 consecutive blinking cycles.
Beeps
Repeated cycle
Blinking at 0.5-
second interval
3-second ON
No beep Beeps
Repeated cycle
MSZ-GE22/25/35/42/50 MSZ-GE60/71
MSZ-HC MSZ-SF
3
Repeated cycle
C-155