Hitachi RAK-15QPC Service Manual page 77

Introduction
First check the failure phenomenon and status, and then move on to elaborate diagnosis.
Initiating troubleshooting
Is the "timer lamp" (orange) of the indoor unit blinking?
Turn off the power, wait at least 5 seconds, turn it back on, and observe the way the horizontal vanes move for about
30 seconds.
Check 1: Have the horizontal vanes moved? (Yes/No)
Set the remote control unit to cooling mode, temperature setting 16
32 (winter) and operate the product.
Check 2: Has the product received the remote control signal and has the "operation lamp" gone on? (Yes/No)
If you responded "Yes" to Check 2:
Check 3: Is the compressor of the outdoor unit running? (Yes/No)
If you responded "No" to Check 2:
Check 4: Does the "emergency operation switch" work? (Yes/No)
Check results and next check items
Check 1 Check 2
No
No
Yes No
Yes Yes
Checking the indoor unit electrical parts
No
Check 3 Check 4
No
Yes
No
Yes
How many times does the time lamp
blinding
time lamp blinking,
please according to the
self-diagnosis display.
(summer), heating mode, temperature setting
Next check item
Go on to "The power will not become turned on".
Go on to "The product will not receive the remote
control signal".
Go on to "The compressor will not run".
77
not 4 times 4 times
outdoor ele.unit check