Brand: SHARP
Category: Home Appliances
Document Type: Manual
Language: EN
Manual for AH-A129E
Uploaded: Nov. 21, 2025, 6:23 p.m.
Manual Publish Date: 1999-01-01
1. **COOL Operation:** The thermostat controls the compressor and outdoor fan based on thermostat lines C1-C4. The compressor turns on/off at lines C3 and C4.
2. **DRY Operation:** The thermostat controls the compressor and fan based on thermostat lines D1-D3. Operation starts for 2 minutes at fan speed "D". Room temperature measured after 2 minutes sets the preset temperature (18-32°C).
3. **Fan Only Operation:** The indoor fan motor runs continuously.
4. **Fan Speed:** Available speeds are HIGH, LOW, SOFT (UL), and MEDIUM (M) depending on the mode.
5. **Timer:** 24-hour programmable ON/OFF timer and a ONE-HOUR timer are available.
6. **Automatic Air Conditioning:** Mode and preset temperature are set automatically based on room temperature.
7. **Auto Restart:** Unit restarts in the same mode after power recovery.
8. **Diagnosis Procedure:** Specific LED timing patterns indicate faults like indoor fan motor issues, compressor lock, or thermistor problems.
Troubleshooting and error codes
| Symptom | Troubleshooting Step | Possible Cause | Action |
|---|---|---|---|
| Machine does not function at all with remote controller and switches on the indoor unit. | Measure voltage between anodes of D1 and D2 on the PWB ass'y 1. | Transformer secondary voltage (approx. 20.6 Vac) | YES: Replace the PWB with a new one. NO: Check 2.5A fuse. |
| Machine does not function at all with remote controller and switches on the indoor unit. | Check 2.5A fuse open circuit. | Fuse open | YES: Replace the fuse and varistor with new ones. NO: Replace the transformer with a new one. |
| Machine does not function at all with remote controller. | Push "O/I" button on the wireless remote controller. | Transmitting indicator active? | NO: Check remote batteries. YES: Check beep sound from indoor unit. |
| Machine does not function at all with remote controller. | Check beep sound from the indoor unit. | Connector CN103 in place? | NO: Connect the connector properly. YES: Check indicator lamp of indoor unit. |
| Machine does not function at all with remote controller. | Check indicator lamp of indoor unit. | Lamp proper? | YES: PWB is normal. Inspect outdoor unit. NO: Replace PWB with a new one. |
| The room is not cooled. The compressor does not operate. | Push "TEST" button on indoor unit, wait 3 minutes. Measure voltage at terminal board (N and 1). | Power supply voltage | YES: Measure resistances of TH1 and TH2. NO: Replace PWB ass'y with a new one. |
| The room is not cooled. The compressor does not operate. | Measure resistances of TH1 and TH2. | Resistances correct (Fig. 1)? | YES: Control circuit normal. Check compressor, running capacitor, refrigerant, outdoor fan motor, and its capacitor. NO: Replace thermistor ass'y with a new one. |