Toshiba Carrier RAV-SP180AT2-UL Service Manual page 66

CODE Outdoor
No. LED display
* There is a possibility that it is one of the following errors.
[P04]
Confirm LED on outdoor P.C. board to judge which error it is.
Power supply error (Vdc), High pressure protective operation, Case thermostat operation
<Display 1> <Display 2>
<Display 1> <Display 2>
Doesn't high-pressure SW operate?
Are parts of high-pressure SW normal?
Are service valves fully opened?
Reset the power supply and perform
a test run appropriate to the season
Cooling operation
B
Does outdoor fan normally operate?
Is there any element to disturb
heat exchange of outdoor unit?
Loading of heat exchanger
Short-circuit
Overcharge of refrigerant
Clogging / Pipe breakage /
Abnormal overload
Heating operation
C
Does the indoor fan normally operate?
Is there any element to disturb
heat exchange of indoor unit?
Clogging of filter
Loading of heat exchanger
Short-circuit
Overcharge of refrigerant
Clogging / Pipe breakage /
Abnormal overload
(Item without special mention Indicates part of outdoor unit.)
[Case thermostat operation] → Refer to [H04] column.
[High-pressure SW error]
1. High-pressure SW error
2. Service valve closed.
3. Indoor/Outdoor fan error
4. Clogging of outdoor PMV
5. Loading of indoor/outdoor heat exchangers or short-circuit
6. Overcharge of refrigerant
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
Check and troubleshooting
Is the circuit wiring normal?
YES
Cooling operation → B
Heating operation → C
Isn't there fan crack
or getting-out of fan?
YES
Are connector connection,
capacitor and fans of the
fan motor normal?
YES
Are resistance value
characteristics of the sensors
(TC, TCJ) normal?
YES
– 66 –
Revised : Feb. 2010
NO
Check and repair wiring.
Check P.C. board.
Defective → Replace
Check parts.
Defective → Replace
Open service valve fully.
NO
Take measures
for defective position.
Connector connection /
Fan IPDU / Fan motor / Wiring
Eliminate disturbing element.
NO
Repair defective position.
NO
Replace TC or TCJ sensor.
Check indoor P.C. board.
Defective → Replace