Mitsubishi Electric PUHY-P168, Руководство по обслуживанию

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[
IX
Troubleshooting ]
2503 Drain sensor
failure When a short or an open
is detected during opera-
tion (cannot be detected
during OFF).
Short :
detectable at 90°C
[194°F] or higher
Open :
detectable at
-20°C [-4°F] or lower (1) Thermistor failure
(2) Connector contact failure
(loose connector)
(3) Disconnected wire or par-
tial disconnected ther-
mistor wire
Check the thermistor resistance.
0°C [32°F] : 6.0 kohm
10°C [50°F] : 3.9 kohm
20°C [68°F]: 2.6 kohm
30°C [86°F] : 1.8 kohm
40°C [104°F] : 1.3 kohm
Indoor board (detection circuit)
failure Check the connector contact.
If no fault is found, the indoor board
is a failure.
2600 Water leakage - Water leaks from the pipes in
such as the humidifier. Check the location of the leak.
2601 Water supply
cut-off - (1) The water tank of the hu-
midifier is empty.
Check the amount of supply water.
Check for the solenoid valve and for
the connection.
(2) The solenoid valve for hu-
midification is OFF.
Check the connector.
(3) Disconnected float switch Check the connecting part.
(4) Poor operation of float
switch
Check for the float switch.
(5) Frozen water tank Turn off the power source of the wa-
ter tank to defrost, and turn it on
again.
4103 Reverse
phase/open
phase 1.When turning on the
power, the operation
cannot be started be-
cause of the open
phase of one of the
power lines (L1, L2 or
L3).
(1) Faulty wiring ΠCheck whether the phase of the
power supply terminal block (TB1)
is normal.
ΠCheck the wiring between the pow-
er supply terminal block (TB1) and
the main boards (CN20 and
CN21).
(2) Main board failure. If the above faults are not found, the
main board is faulty.
2.The operation cannot
be started because of
the reserve phase of
one of the power lines
(L1, L2 or L3).
(1) Power supply error
ΠOpen phase of power
supply voltage
Œ
Power-supply voltage
drop
Check the input resistance of the
power supply terminal block (TB1).
(2) Faulty wiring
Between the power supply
terminal block (TB1) and
the main boards (CN20
and 21)
Œ
Measure voltages of pin 5 of the
male connector (CN20) on the
main board and between pins 1
and 3 of the male connector
(CN21) on the main board.
ΠIf the voltage is not the same as the
power supply voltage, the wiring is
faulty.
(3) A fuse is blown. Check whether the fuses of the main
board (both F01 and F02) are not
blown.
(4) Main board failure If the above faults are not found, the
main board is faulty.
Error Code
Error definition and error
detection method
Cause Check method and remedy
TB1
L1 CN20 5Pin
L2 CN21 3Pin
L3 CN21 1Pin
Pin