Hitachi RAC-112SQB, Installation Manual

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6. Error Code Table
1) When “EE” appears, this means there is a critical error; the compressor is probably blown.
Code Error Cause
01
Indoor unit protective device activation
(float switch) The float switch is activated when (1) abnormal high water level of the
condensate tank or (2) there are pipe abnormalities.
02
Outdoor unit protective device
(except for codes 41 and 42) High-pressure switch (4.15MPaG) activation; outdoor fan locked in cooling
mode.
03 Signal transfer error (indoor
Æ
outdoor)
Loosened or broken wires or incorrect wiring of the operation circuit between
the indoor and outdoor units; the fuse of the outdoor unit is blown.
04 Signal transfer error (inverter)
Signal transfer error between the circuit board and the inverter or the power fuse
is blown.
05 Phase check error
Open phase of the outdoor unit power supply due to reverse wiring or loosened
wires.
06 Outdoor unit voltage error Outdoor unit is under-voltage, power cable capacity is inadequate.
07
Degree of superheat at compressor outlet
drops significantly
The indoor unit electronic valve is locked.
08 Compressor upper temperature is too high. Refrigerant insufficiency or leakage; refrigerant pipe clogging.
11
Air inlet temperature sensor error (indoor
unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
12
Air outlet temperature sensor error (indoor
unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
13
Anti-frost temperature sensor error
(indoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
14
Heat exchanger pipe temperature sensor
error
(indoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
19 Indoor unit fan motor protection activation Indoor unit fan motor protection activation.
20
Compressor upper temperature sensor
error
(outdoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
22
Open air temperature sensor error
(outdoor unit) (broken wire, short circuit)
Wires are loosened, disconnected, or broken.
24
Pipe temperature sensor error
(outdoor unit) (broken wire, short circuit) Wires are loosened, disconnected, or broken.
Heating outdoor fan motor is locked.
31 Indoor/outdoor unit capacity mismatch Indoor unit capacity is 100-130% higher than the outdoor unit capacity.
35 Indoor unit number setup error
Repeated number setting or the number is greater than the connected number of
indoor units.
38
Protection check circuit error (outdoor
unit)
Error of the outdoor unit protection check circuit.
41
Cooling overload
(high pressure switch activated) When the outdoor unit protection activates, compressor upper temperature is
over 95ºC, and the outdoor unit pipe is over 55ºC.
42
Heating overload (No Function)
(high pressure switch activated) When the outdoor unit protection activates, compressor upper temperature is
over 95ºC, and the outdoor unit pipe is over 55ºC.
47 Low pressure protection is activated
The unit stops 3 times within one hour, as the evaporation temperature is
excessively low. Heating outdoor unit fan motor is locked.
48 Overload protection is activated
Pressure rise due to too much refrigerant, pipe clogged, and circulation error;
compressor error (overload, locked, over-current).
51 Current check error Operation overload (heat exchanger clogged, etc.)
53 Power module protection is activated
Inverter error (overload, over-current, revolution error, start failure);
compressor error.
54
Inverter fin temperature sensor error,
protection is activated
Fin temperature sensor error, heat exchanger clogged, fan error.
55 Inverter failure Inverter circuit board error.
57 Outdoor unit fan motor error
Circuit board—fan motor connection: broken wires, incorrect wiring; fan motor
fault.
59 Inverter fin temperature sensor error Wires are loosened, disconnected, broken, and short circuit.
b1 Refrigerant system location error Set location over 64.
EE Compressor protection error Three times within six hours.
Note: When the operation light on the remote control blinks every two seconds repeatedly, this means there is a signal transfer error
between the indoor unit and the remote control (wires loosened, disconnected, broken; incorrect wiring, etc.).
□
2) Check the outlet temperature of each indoor unit during operation. If the temperature difference of different units exceeds the range
(over 10ºC for cooling), this may be a refrigerant piping problem. Check refrigerant piping again.
□
3) Lastly, please hand over the warranty card, user’s manual, and installation manual to the customer.
Warning! Do not operate the unit before Test run is completed. Check electrical wiring exactly.