Hitachi RAS-EH36PHLAE Service Manual page 108

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SELF-DIAGNOSIS DISPLAY MODE (INDOOR SIDE) MODEL RAS-EH36PHLAE
While the "timer lamp" (orange), of the indoor unit is blinking, troubleshoot the product
while referring to the table below.
1. How to count the lamp blinking frequency
·The product will repeat blinking with 2-second
intermissions.
·The blinking speed is as follows: on for 0.35 seconds and
off for 0.35 seconds.
2. If you wish to try another operation while the lamp is blinking, operate the START/STOP button on the remote control unit
twice. The first push will reset the indoor microcomputer, while the second will activate the product
Refer to the table below if the timer indicator (orange) is blinking.
LAMP BLINKING MODE
I
I
2sEc
I I
2SEC
111
I
I
is
I I
112
1s
I I
112
1s
I I
112
1s
I I
112
1s
* IF THE INTERFACE CIRCUIT IS DEFECTIVE WHEN THE POWER IS TURNED ON.
THE SELF-DIAGNOSIS INDICATION WILL NOT WORK.
* IF THE INDOOR UNIT CAN NOT BE OPERATED AT ALL.
REFER TO THE BELOW TABLE IF THE INDOOR UNIT DOSE NOT WORK AT ALL.
FIX CN2 CONNECTOR
FU1 (3.15A) FUSE BLOWN
COME OFF OR DISCONNECTION OF THE
CONNECTOR FOR INDICATING P.W.B
FAILURE OF CONTROL P.W.B
-----ONCE
I
-----� IMES
I
3
2SEC
----
TIMES
l 2 sEc
I
4
---
TIMES
I
9
SEC
---
TIMES
I
10
SEC
---
TIMES
I
12
sEc
---
TIMES
I
13
sEc
---
TIMES
( ---'-=- LIGHT FOR 0.35 SEC AT INTERVAL OF 0.35 SEC)
BLOWING/DISCONNECTION OF FU1(3.15A)
[An example of 5-time blinking]
11111
2-second
intermissiorl
MAIN DEFECTIVE
REFRIGERANT CYCLE DEFECTIVE
FORCED OPERATION OF OUTDOOR
UNIT
INDOOR INTERFACE CIRCUIT
OUTDOOR ELECTRICAL ASSEMBLY
DEFECT
ROOM OR HEAT EXCHANGER THERMISTOR
OR HUMIDITY SENSOR DEFECT
OVERCURRENT IN DC FAN MOTOR
OUTDOOR INTERFACE CIRCUIT
IC531 OR EEPROM DATA DEFECT
ACTION /REPLACEMENT PARTS, etc
REPLACE THE PART WHICH CAUSED
FUSE
FIX CN16 CONNECTOR
REFER TO THE SERVICE GUIDE FOR
HOW TO DETERMINE THE FAILED PART
108
11111
1111
2-second
intermission

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