Hitachi RAS-EH36PHLAE Service Manual page 111

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Self Diagnosis Memory Function
Failure mode are stored in the non-volatile memory of indoor unit and can be redisplay by operating the remote controller.
This function is very useful in checking the failure modes when either unintentionally switching OFF power supply or
restarting the unit operation without conforming the number of blinking of self diagnosis lamp. Remote controller
can be redisplay up to last 5 failure modes from the memory. However, failure modes which are rarely occur are also stored
in the memory which caused the number of failure easily become more than 5. Thus, for some failure modes which are unable
to retrieve because of the remote controller limit to redisplay only 5 failure modes, it can be found by clearing up the memory
first then recheck the memory content again during the visit at the customer place.
<How to redisplay failure diagnosis>
1. Turn OFF the circuit breaker on the unit side. (wait for around 5 scond)
8
2. Press the [
(MODE)] button and select [Cool mode (¢)]. The remote should be in 'Standby' mode.
3. Turn the circuit breaker ON.
4. Set the room temperature on the remote controller to 32'C by pressing the [ � (Temp Up)] button.
5. Set which failure information that need to be redisplay by using [
(Refer to the corresponding table below)
Fan Speed
Auto
Cr
Hi
Med
Cr
Lo
Silent
i;:.;i
6. While directing th � remote controller towards the receiver of the indoor unit, press [
m
ff j
button and [ I
(On/Off)] button simultaneously.
0
(The remote controler perform signal transmission with the indoor unit)
7. The indoor unit beep [Pi-] to indicate that it has just received the signal to redisplay the failure mode.
8. Start counting the number of blinking of the Timer lamp (indicating indoor error) and Operation
lamp (indicating outdoor error) and confirm it with indoor unit or outdoor unit self-diagnosis table.
9. After everything is completed, turn OFF the circuit breaker (must do without fail).
<How to clear the stored data>
1. Conduct the redisplay of failure mode. (Follow above procedure)
2. Turn the circuit breaker OFF. (Wait for 5sec or more)
El
3. Press the [
(MODE)] button and select [Dry mode ( 6)]. The remote should be in 'Standby' mode.
4. Turn the circuit breaker ON.
5. Set the room temperature on the remote controller to 16'C by pressing the [
6. While directing the remote controller towards the receiver of the indoor unit, press [ @1 (Temp Down)] button
0ff
and [ [
cb
l (On/Off)] button simultaneously.
0
(The remote controller perform signal transmission with the indoor unit.)
7. The indoor unit beep for a few second [Pi-] to indicate that it has just receive the signal. The data has been cleared.
8. After everything is completed, turn OFF the circuit breaker (must do without fail).
Notes:
*
This function is valid only once right after the power supply is turned ON and it will not work if other remote controller
operation was made prior to it.
Also, this function will not work if above steps were not followed accordingly. (If the above procedures are not working,
please repeat from the start.)
*
If nothing was stored in the memory, the lamp does not blink even the redisplay operation is carried out.
*
To carry out normal operation, turn OFF the power supply. After redisplay operation, the remote controller reception
will not work as normal.
Failure data stored
Latest
2nd latest
3rd latest
4th latest
Oldest
111
' ' "it
(Fan Speed)] button.
LEJ
(Temp Up)]
Temp
..._,, (Temp Down)] button.
@1

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