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[
IX
Troubleshooting ]
- 202 -
HWE1113B
GB
Cause
Check method and remedy
2.
HBC controller LEV1 and 2 actuation failure
Sufficient hot water is not supplied on the HBC con-
troller due to HBC controller LEVI, 2, and 3 actuation
failure.
Refer to the page of LEV troubleshooting ([4] -5-
).(page 212)
3.
Temperature reading error on the indoor unit piping
temperature sensor
If the temperature reading on the sensor is higher
than the actual temperature, it makes the subcool
seem smaller than it is, and the LEV opening de-
creases too much.
Check the thermistor.
4
RPM error of the outdoor unit FAN
Refer to the page on outdoor unit fan ([4] -4-
).(page 211)
Motor failure or board failure, or airflow rate de-
crease, pressure drop due to clogging of the heat
exchanger leading to high discharge temperature
The fan is not properly controlled as the tempera-
ture cannot be precisely detected with the piping
sensor.
5.
Insulation failure of the refrigerant piping
6.
Long piping length
Excessively long piping on the high pressure side
causes pressure loss leading to increase in the high
pressure.
Confirm that the characteristic of capacity drop due
to piping length.
-> Change the pipe
7.
Piping size is not proper (thin)
8.
Clogging by foreign object
Check the temperature difference between the up-
stream and the downstream of the pipe section that
is blocked. Since blockage in the extended section
is difficult to locate, operate the unit in the cooling
cycle, and follow the same procedures that are
used to locate the blockage of pipe during cooling
operation.
->Remove the blockage in the pipe.
9.
The indoor unit inlet temperature is excessively
high.(exceeding 28°C [82°F])
Check the inlet air temperature and for short cy-
cling. Change the environment where the indoor
unit is used.
10.
Insufficient refrigerant amount
Protection works and compressor frequency does
not rise due to low discharge temperature
Refrigerant recovery operation is likely to start.
Refer to 2 - 1. (Compressor frequency does not rise
sufficiently.)(page 201)
Refer to the page on refrigerant amount
adjustment.(page 121)
11.
Compressor failure (same as in case of cooling)
Check the discharge temperature.
12.
HBC controller LEV3 actuation failure
A drop in the low pressure that is caused either by a
blockage of liquid pipe or by a pressure loss and the
resultant slowing of refrigerant flow causes a tenden-
cy for the discharge temperature to rise.
Refer to the page on troubleshooting the LEV ([4] -
5-).(page 212)
13.
HBC controller 3-way valve/water flow rate control
valve actuation failure
Sufficient hot water is not supplied because of the in-
sufficient water flow rate and coexistence of cold and
hot water on the HBC controller due to 3-way valve/
water flow rate control valve actuation failure.
Refer to the section on 3-way valve/Water flow rate
control valve fault under
"Troubleshooting."(page 237)
Содержание City Multi CMB-WP108V-G
Страница 1: ...AIR CONDITIONER 2014 Service Handbook PURY WP200 WP250YJM A CMB WP108V G Model 3rd edition ...
Страница 11: ... 2 HWE1113B GB ...
Страница 27: ... I Read Before Servicing 18 HWE1113B GB ...
Страница 29: ... 20 HWE1113B GB ...
Страница 57: ... 48 HWE1113B GB ...
Страница 70: ... III Outdoor Unit Components 61 HWE1113B GB 2 Power supply circuit board ...
Страница 71: ... III Outdoor Unit Components 62 HWE1113B GB ...
Страница 73: ... 64 HWE1113B GB ...
Страница 81: ... IV Remote Controller 72 HWE1113B GB ...
Страница 83: ... 74 HWE1113B GB ...
Страница 88: ... 79 HWE1113B GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 81 2 Principal Parts and Functions 83 ...
Страница 89: ... 80 HWE1113B GB ...
Страница 97: ... 88 HWE1113B GB ...
Страница 127: ... 118 HWE1113B GB ...
Страница 135: ... VIII Test Run Mode 126 HWE1113B GB ...
Страница 137: ... 128 HWE1113B GB ...
Страница 252: ... 243 HWE1113B GB X LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 245 ...
Страница 253: ... 244 HWE1113B GB ...