Sanyo 2-WAY ECO-i SPW-KR74GXH56A - Page 137

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W-2WAY ECO-i SYSTEM
Trouble Diagnosis
4. W-2WAY ECO-i Alarm Codes
P22 Alarm
Alarm code P22
Alarm meaning Fan motor trouble
Alarm conditions Fan motor start failure, fan motor Hall IC input failure
Probable cause Possible causes are a Hall IC input circuit failure and a fan HIC failure.
Check Check the fan motor wiring, the Hall IC wiring, and the connector connections. If the wiring and
connectors are normal, then check that the capacitor of the Hall IC input circuit is securely
soldered on the outdoor unit control PCB. Also use a tester and measure the resistance between
fan HIC power (HIC+) and ground (HIC–). If there is a short circuit, there is an HIC malfunction.
Correction If the fan does not start, the below corrections may be effective.
(1) If there is a fan HIC failure or circuit failure, replace the PCB.
(2) If the fan motor is locked, replace the fan motor.
Example —
Notes Turn OFF the power, and check the continuity of “+” and “–” on the fan circuit PCB.
P26 Alarm
Alarm code P26
Alarm meaning Inverter compressor high-frequency overcurrent alarm
Alarm conditions This alarm occurs when current trouble or current detection trouble occurs at an inverter
frequency of 80 Hz or higher after start (when trouble judgment current is detected in the
primary or secondary current, or when an instantaneous secondary current of 13.5 A or higher is
detected).
Probable cause The detection methods are the same as for P16. However the fact that operation up to high
frequencies is possible does not necessarily mean that a compressor failure is the cause of the
trouble. Start the compressor several times. If alarm P26 occurs every time and alarm P16 does
not occur at all, then the possibility of a compressor failure is low.
Check Check the power wiring and connector wiring.
Correction It is possible to resolve this trouble by limiting the maximum frequency.
Example —
Notes —
Fan circuit on the outdoor unit control PCB
(+)
(–)
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