[8-8 Troubleshooting LEV Problems ]
- 324 -
HWE1314A
GB
8-8-2
Possible Problems and Solutions
Malfunction
mode
Judgment method
Remedy
LEV
Microcomput-
er driver circuit
failure
Disconnect the control board connector and connect the
check LED as shown in the figure below.
resistance : 0.25W 1kΩ
LED : DC15V 20mA or more
When the main power is turned on, the indoor unit circuit
board outputs pulse signals to the indoor unit LEV for 10
seconds.
If any of the LED remains lit or unlit, the drive circuit is faulty.
When the drive circuit
has a problem, replace
the control board.
Indoor unit,
Outdoor unit
and BC control-
ler
LEV mecha-
nism is locked
If the LEV is locked, the drive motor runs idle, and makes a
small clicking sound.
When the valve makes a closing and opening sound, the
valve has a problem.
Replace the LEV.
Indoor unit,
Outdoor unit
and BC control-
ler
Disconnected
or short-circuit-
ed LEV motor
coil
Measure resistance between the coils (red - white, red -or-
ange, red - yellow, red - blue) using a tester. They are nor-
mal if resistance is 100Ω ± 10%.
Replace the LEV coils. Outdoor unit
(LEV5a,5b) and
BC control-
ler(LEV3,
LEV1(G1 type)
Measure resistance between the coils (red - white, red -or-
ange, brown - yellow, brown - blue) using a tester. They are
normal if resistance is 150Ω ± 3%.
Replace the LEV coils. Indoor unit and
BC control-
ler(LEV1(GA1,
HA1 type)
Incomple seal-
ing
(leak from the
valve)
When checking the refrigerant leak from the indoor LEV,
run the target indoor unit in the fan mode, and the other in-
door units in the cooling mode. Then, check the liquid tem-
perature (TH22) with the self-diagnosis LED. When the unit
is running in the fan mode, the LEV is fully closed, and the
temperature detected by the thermistor is not low. If there is
a leak, however, the temperature will be low. If the temper-
ature is extremely low compared with the inlet temperature
displayed on the remote controller, the LEV is not properly
sealed, however, if there is a little leak, it is not necessary
to replace the LEV when there are no effects to other parts.
If there is a large
amount of leakage, re-
place the LEV.
Indoor unit
Faulty wire
connections in
the connector
or faulty con-
tact
1
.
Check for loose pins on the connector and check the
colors of the lead wires visually
Check the continuity at
the points where an er-
ror occurs.
Indoor unit,
Outdoor unit
and BC control-
ler
2
.
Disconnect the control board's connector and conduct a
continuity check using a tester.
6
5
4
3
2
1
1 k
LED
Thermistor
(liquid piping
temperature detection)
Linear Expansion Valve
Содержание PURY-EP200YLM-A
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Страница 13: ... 2 HWE1314A GB ...
Страница 29: ... 1 5 Cautionary notes on installation environment and maintenance 18 HWE1314A GB ...
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Страница 44: ... 2 6 System Connection Example 33 HWE1314A GB 2 Restrictions ...
Страница 58: ... 2 7 Example System with an MA Remote Controller 47 47 HWE1314A GB 2 Restrictions ...
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Страница 125: ... 4 6 BC Controller Circuit Board Components 114 HWE1314A GB 4 6 2 Four Relay Board 4 6 3 Ten Relay Board ...
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Страница 227: ... 6 11 Standard Operation Data Reference Data 216 HWE1314A GB ...
Страница 230: ... 219 HWE1314A GB 7 9 9 Error Code 7113 292 7 9 10 Error Code 7117 293 7 9 11 Error Code 7130 294 ...
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Страница 393: ... 8 16 Troubleshooting Problems Using the LED Status Indicators on the Outdoor Unit 382 HWE1314A GB ...
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