Mitsubishi Electric Mr.Slim PUZ-HA30NHA2, Руководство по обслуживанию

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6 7
<Abnormalities detected while unit is operating>
Error Code
Abnormal point and detection method Judgment and action
U1
(10)
High pressure (High-pressure switch
63H worked)
Abnormal if high-pressure switch 6H
worked (
w
) during compressor operation.
w
.1 MPa [60PSIG]
6H: High-pressure switch
1
Short cycle of indoor unit
2 Clogged filter of indoor unit
3
Decreased airflow caused by
dirt of indoor fan
4
Dirt of indoor heat exchanger
5
Locked indoor fan motor
6 Malfunction of indoor fan motor
7
Defective operation of stop
valve (Not full open)
8
Clogged or broken pipe
9
Locked outdoor fan motor
0 Malfunction of outdoor fan
motor
1 Short cycle of outdoor unit
2
Dirt of outdoor heat exchanger
3 Decreased airflow caused by
defective inspection of outside
temperature thermistor
(It detects lower temperature
than actual temperature.)
4 Disconnection or contact failure
of connector (6H) on outdoor
controller board
5 Disconnection or contact failure
of 6H connection
6 Defective outdoor controller
board
7
Defective action of linear
expansion valve
8
Malfunction of fan driving
circuit
1
~
6
Check indoor unit and repair defect.
7
Check if stop valve is fully open.
8
Check piping and repair defect.
9
~ 2 Check outdoor unit and repair defect.
3 Check the detected temperature of outside
temperature thermistor on LED display.
(SW on A-Control Service Tool : Refer to
10-10.)
4 ~ 6 Turn the power off and check F is
displayed when the power is on again.
When F is displayed, refer to “Judgment
and action” for F.
7
Check linear expansion valve.
Refer to 10-6.
8
Replace outdoor controller board.
Case
U
(110)
High discharging temperature
(1) Abnormal if discharge temperature
thermistor (TH) exceeds 1
:
[257˚F] or 110
:
[230˚F] continuously
for minutes.
Abnormal if condenser/evaporator
temperature thermistor (TH) exceeds
0
:
[104˚F] during defrosting and
discharge temperature thermistor (TH)
exceeds 110
:
[230˚F].
() Abnormal if discharge superheat
(Cooling: TH – TH / Heating: TH –
TH6) exceeds 70degC [16degF].
1
Overheated compressor opera-
tion caused by shortage of
refrigerant
2
Defective operation of stop
valve
3
Defective thermistor
4
Defective outdoor controller
board
5 Defective action of linear
expansion valve
6 Clogging with foreign objects in
refrigerant circuit.
w
Clogging occurs in the parts
which become below freezing
point when water enters in the
refrigerant circuit.
1
Check intake superheat.
Check leakage of refrigerant.
Charge additional refrigerant.
2
Check if stop valve is fully open.
34
Turn the power off and check if U is dis-
played when the power is on again.
When U is displayed, refer to “Judgement
and action” for U.
5 Check linear expansion valve.
Refer to 10-6.
6 After recovering refrigerant, remove water
from entire refrigerant circuit under vacuum
more than 1 hour.
<Abnormalities detected while unit is operating>