– 93 –
INSPECTING OUTDOOR ELECTRICAL PARTS
LED number
Name
Diagnosis
lamp 1
Diagnosis
lamp 2
Operation
lamp
Communications
lamp
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Blinks
(blinks)
Off
(blinks once)
Off
Off
On
On
On
On
Off
Off
Off
Off
Off
Case 1
Case 2
Blinks once
Blinks
Blinks
On
On
On
On
Off
Off
Off
Off
Normal operation
Communications error
Thermistor abnormally
Abnormally stop
Normal off status or
unconnected
microcomputer power
source
Microcomputer reset
status (immediately
after inserting power
source or immediately
after power source
abnormally)
OVL1 operation
OVL2 operation
OVL3 operation
Normal operation
Normal operation
Normal operation
Normal operation
On
Case 3
Case 4
Case 5
Case 6
Case 7
Case 8
Case 9
LD301
LD302
LD303
LD304
Status
Checkpoints
If the LED is not on even when the
power source is connected the
microcomputer power source is
unconnected.
Inspection method 1
Abnormally stop is shown by the
number of times the LED blinks.
Inspection method 2
Thermistor abnormally is shown by
the number of times the LED blinks.
Inspection method 3
*In the case that an internal unit is
Communications error is shown
by the number of times the LED
blinks.
not connected, the number of
connected internal units is
shown by the number of times
the LED blinks. This is not a
abnormally. The internal unit
has no communications error
and is able to operate normally.
Inspection method 4
If is normal for LD301 to blink once
after the power source has been
inserted. If the unit stops when it is in
operation and LD301 blinks once, it is
possible that the power source has
been temporarily interrupted by
lightening or for some other reason.
Replace the control PCB if this occurs
frequently.
Check to see that the LED is either on or blinking.
Carry out inspections by examining the on/blinking status of LEDs 301-304.
‚O E E E E E‚`
LD304
LD303
LD302
LD301
Summary of Contents for RAM-52QH5
Page 16: ... 15 MODEL RAM 52QH5 ...
Page 17: ... 16 MODEL RAM 53QH5 ...
Page 30: ... 29 CAPACITY DIAGRAM RELATED TO THE PIPING LENGTH MODEL RAM 53QH5 ...
Page 36: ...CIRCUIT DIAGRAM MODEL RAM 52QH5 39 L C023 C022 C002 C001 C025 C024 N ...
Page 37: ...CIRCUIT DIAGRAM MODEL RAM 53QH5 41 L C023 C022 C002 C001 C025 C024 N ...
Page 40: ... 45 ...
Page 42: ... 49 Outdoortemperature STAROTP_C TSKTM1_C1 Outdoortemperature STAROTP_C TSKTM1_C2 ...
Page 43: ... 51 ...
Page 44: ... 53 ...
Page 45: ... 55 ...
Page 46: ... 57 ...
Page 58: ... 69 REFRIGERATING CYCLE DIAGRAM RAM 52QH5 ...
Page 59: ... 70 REFRIGERATING CYCLE DIAGRAM RAM 52QH5 ...
Page 60: ... 71 REFRIGERATING CYCLE DIAGRAM RAM 53QH5 ...
Page 61: ... 72 REFRIGERATING CYCLE DIAGRAM RAM 53QH5 ...
Page 64: ... 75 5A ...
Page 67: ... 78 3 System power Module Circuit ...
Page 71: ... 82 ...
Page 72: ... 83 5 Reversing valve control circuit Fig 5 1 ...
Page 87: ... 101 ...
Page 88: ... 102 ...
Page 94: ... 108 TROUBLESHOOTING OF THE SYSTEM POWER MODULE ...
Page 95: ... 109 ...
Page 96: ... 110 ...
Page 98: ... 112 three three inlet 3 Cut off the three pipes at the side and bottom of Reversing valve ...
Page 99: ... 113 ELECTRIC EXPANSION VALVE PIPE THERMISTOR POSITION CHARTS MODEL RAM 53QH5 MODEL RAM 52QH5 ...
Page 104: ...HITACHI PM NO 0428E Printed in Malaysia RAM 52QH5 RAM 53QH5 ...