Error Code List - Toyotomi KURO Mini Service Manual

Display method of indoor unit
Indicator display
Error
Power Cool Heat
code
indicator indicator indicator
Flash
15
times
Flash 6
times
Flash 5
times
Flash 3
times
Flash
once
Flash
twice
Flash
11
times
Flash
22
times

Error Code List

Applicable model: SPLIT TYPE and FLOOR STANDING
Malfunction
AC status
name
Malfunction of The complete unit stops operation 1. Jumper cap is not installed in control panel;
jumper cap
Communication Cool: compressor stops
malfunction operation, while indoor fan
between indoor operates;
unit and outdoor Heat: all loads stops operation.
unit
IPM protection Cool/Dry: compressor stops
operation, while indoor fan
operates.
Heat: all loads stops operation.
Malfunction of Cool/Dry: all loads stops
outdoor fan/ operation except indoor fan.
malfunction of Heat: all loads stops operation.
DC motor
Overload Cool/Dry: compressor stops
protection of operation, while indoor fan
compressor operates.
Heat: all loads stops operation.
Refrigerant Cool: compressor and outdoor
insufficient fan stops operation, while indoor
protection, cut- fan operates;
off protection of Heat: Compressor, outdoor fan
refrigerant and indoor fan stops operation.
Indoor ambient Cool/Dry: indoor fan operates,
temperature while compressor and outdoor fan
sensor is open/ stops operation;
short-circuited Heat: all loads stops operation.
Indoor Cool/Dry: indoor fan operates,
evaporator while compressor and outdoor fan
temperature stops operation;
sensor is open/ Heat: all loads stops operation.
short-circuited
No feedback The complete unit stops operation 1. Is the fan blocked?
from indoor
unit's motor
Indoor unit and Heat: compressor, outdoor unit
outdoor can be and indoor fan stops operation.
matched with
each other
Malfunction of Heat: all loads are stopped;
jumper cap of other modes: outdoor unit stops
outdoor unit operation.
Gas valve
temperature
sensor is ON /
short-circuited
Possible causes
2. Poor contact of jumper cap;
3. Jumper cap is damaged;
4. The tested circuit of jumper cap on control panel is abnormal.
See Page 46 "Communication malfunction"
See Page 48 "IPM protection, over-phase current of
compressor"
1. Outdoor condenser, air inlet and air outlet are blocked by filth
or dirt;
2.Fan is blocked or loosened;
3.Motor or connection wire of motor is damaged;
4.Main board of outdoor unit is damaged;
(As for dual-outdoor fan, L3 indicates fan 1; LA indicates fan 2)
1. Overload wire of compressor is loose;
2. The overload protector is damaged. Under normal
circumstances, the resistance between both ends of terminal is
less than 1ohm.
3.See Page 49 "Overload protection of compressor , High
discharge temperature protection of compressor"
1. Is system cooling under high humidity environment, thus
temperature difference of heat transfer is small;
2. Check whether the big valve and small valve of outdoor unit
are opened completely;
3. Is the temperature sensor of evaporator of indoor unit loose?
4. Is the temperature sensor of condenser of outdoor unit
loose?
5. Is the capillary or the electronic expansion valve blocked?
6. Is refrigerant leaking?
1. Temperature sensor is not well connected;
2. Temperature sensor is damaged
(refer to Page 69 "Table 1")
3. Main board of indoor unit is damaged.
1. Temperature sensor is not well connected;
2. Temperature sensor is damaged
(refer to Page 69 "Table 2")
3. Main board of indoor unit is damaged.
2. Is the motor terminal loose?
3. Is the connection wire of motor damaged?
4. Is the motor damaged?
5. Is the main board of indoor unit damaged?
Capacity of indoor unit and outdoor unit can't be matched.
Jumper cap of outdoor unit hasn't been installed.
1. Temperature sensor is not well connected or damaged; (refer
to Page 69 "Table 2")
2. The wire of temperature sensor is damaged, causing short
circuit to copper pipe or outer casing;
3. Main board of outdoor unit is damaged.
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