Haier H-MRV Series Service Manual page 170

Pressure switch circuit
13
Suction
16 temperature protection
(TS)
Discharge
19 temperature protection
at low frequency (TD)
846-to-857
20
transmission error
857-to-846
21
transmission error
Indoor
22
transmission error
846EEPROM/857EEP
23
ROM error
Note: The model is provided with 1 high-pressure switch and 1 low-pressure switch in series.
The compressor features a built-in compressor overload protector.
are 3 alarms within 30 minutes, the fault code
11 is displayed. The fault is not fixable.
Pressure switch is activated. The fault is
corrected after the normal pressure is restored
for 2 minutes.
line After the compressor has operated for 10
minutes, the temperature detected by TS
sensor is above 40°C. Corrected in 2 minutes.
line When the inverter compressor operates at a
frequency of S3 and S4, the temperature
detected by TD1 sensor is above 110°C.
200 times of failure in transmission. An alarm
is given and the indicator flashes.
200 times of failure in transmission. The fault
code is displayed.
unit-to-846 Receiving no signals from indoor unit for 4
minutes. The fault code 22 is displayed.
An alarm is given and the fault code is
displayed.
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