Mitsubishi Heavy Industries FDURA501 User Manual

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Error display :
e49
[Abnormal low pressure or low pressure sensor wire disconnected]
(Only case of FDCA801, 1001 type)
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
YES
NO
NO
NO
Correction
Replacement low
pressure sensor
Change of outdoor
unit PCB
Is the low pressure sensor
connector’s connection
(sensor side, PCB side) OK?
Did it retun to normal?
Is the amount of refrigerant appropriate?
Is the refrigeration circuit abnormal?
CM operation
CM stop
Low pressure (Mpa)
0.079 (0.120) 0.128
Abnormal pressure detection
● Display Conditions
The compressor stops if the low pressure sensor detects a pressure of 0.079 (0.120) MPa or lower con-
tinuously for 15 seconds.
After a 3-minute delay, the compressor restarts, but if this occurs 3 times within 60 minutes.
[Gas low error] (Only case of FDCA801, 1001 type)
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
1 time flash
Keeps flashing
Outdoor unit
YES
Is E52
Cooling operation
E52 Heating operation
displayed in the remote
controller’s
screen?
The 52C is abnormal.
12
Indoor unit
Red LED
Green LED
Stays OFF
Keeps flashing
Red LED
Green LED
Lights contiously
Keeps flashing
Outdoor unit
Error display :
e52
Note (1) Values in ( ) show in the case where 10 minutes or longer have passed since the compressor started.
Is the service valve fully open?
Are the
indoor heat exchanger and return
air temperature thermistor connector
connections OK?
Are the
characteristics of the indoor heat
exchanger and return air temperature
thermistors OK?
Is the low pressure during
operation appropriate?
Open it fully.
NO
YES
NO
YES
YES
NO
YES
NO
Indoor control PCB is faulty. Replace it.
(Indoor heat exchanger and return air tem-
perature thermistors input circuits are faulty.)
Correction
Charge with refrigerant.
The indoor heat exchanger and
return air temperature thermistor
are faulty. Replace them.
Temperature (°C)
15
10
5
010 304020 50
5kΩ at 25°C
Indoor unit heat exchanger
thermistor (Th I- R),
Return air thermistor (Th I- A)
Resistance temperature characteristics
Resistance
(k
Ω)
[52C Abnormal]

Mitsubishi Heavy Industries FDURA501 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	FDURA501
Category	Air Conditioner
Language	English