Amana PTAC Air Conditioner Error Codes Package Terminal, Air Conditioner/Heat Pump. Amana Diagnostic Codes; If there are no active failures or lockouts, the display will show a double dash, “- -”. If there is a code listed, see the unit “Diagnostic Codes” chart for a list of definitions.
Amana PTAC Air Conditioner Error Code Solutions
| Error Codes | Problem |
|---|---|
| FP | Freeze Protection Engaged. The room temperature measured by the wireless remote thermostat or indoor ambient thermistor active sensor falls below 40°F. No Action required. This setting will disengage when the room temperature rises above 43°F. |
| Fd | Front Desk switch is closed. All outputs are switched off. Open front desk switch to allow occupant unit operation. |
| Eo | Un-Configured Service Board – All operation held awaiting configuration. Enter Configuration Menu and set “C3” to “C” for coolers with electric heat or “H” for heat pumps. |
| EH | Emergency Hydronic Engaged. The EHH switch is closed. Compressor is switched off. Open front emergency hydronic switch to allow occupant unit operation. |
| LS | Load Shedding Engaged. The LS switch is closed. Compressor and Electric heat is switched off. Open load shedding switch to allow occupant unit operation. |
| On | Control is configured to respond to a wired thermostat. No action if a wired thermostat is being used. Otherwise, see Configuration Settings. |
| oP | Open Door Lockout (DS1 & DS2 open; wireless). Close Room Door. Unit will not condition space with door open. |
| nP | Window Switch Lockout – (LS & INN open). Close Room Door or Window. Unit will not condition space with door or window open. |
| HP | Heat Sentinel – (WIAT > u3). No action required. This setting will disengage when the room temperature falls. |
| Ur | Un-Rented Status (EHH & INN or wireless). Front Desk needs to set to Rented mode (if applicable). |
| F1 | Indoor Ambient Thermistor reads outside the range -20°F to 200°F & the wireless thermostat is not communicating to the unit control or Indoor Ambient Thermistor (IAT) without a wireless remote thermostat reads outside the range -20°F to 200°F. Replace black Indoor Ambient Thermistor or Wireless Remote Thermostat. |
| F2 | Wireless Remote Thermostat failure. Replace Wireless Thermostat. |
| F3 | Indoor Ambient Thermistor reads outside the range -20°F to 200°F. Replace black Indoor Ambient Thermistor. |
| F4 | Indoor Coil Thermistor either above or below operating tolerances. Replace Red Indoor Coil Thermistor. |
| F5 | Wireless Thermostat failure. Attempt to rebind Wireless Thermostat or Replace Wireless Thermostat. |
| F6 | Indoor Discharge Thermistor either above or below operating tolerances. Replace Yellow Indoor Discharge Thermistor. |
| Fb | Low Remote Battery Warning. Replace Batteries in Wireless Devices. |
| H1 | High Voltage Protection engaged. Power supply voltage is to high. Check for incoming power at correct voltage. |
| br | Brown Out Protection engaged. Power was lost or voltage is low. Check for incoming power at correct voltage. |
| L6 | Discharge Air Too Hot. Clean Filter or Remove Air Blockage. |
| LC | Outdoor Coil Thermistor temperature high. Clean Condenser Coils, Check Fan for fault. Code will reset after cleaning. |
| C2 | Indoor Air Recirculation. Large delta between thermostat and return. Clean Filter or Remove Air Blockage or Close Vent Door or Improve indoor to outdoor seal. |
| C5 | Outdoor Coil temperature too high for outdoor ambient temperature. Check for Blocked Outdoor Air or Clean Coil. |
| C1 | Indoor Coil is freezing up. Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. |
| C3 | Indoor Coil is freezing up. Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. |
| C4 | Indoor Coil froze up. Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. |
| C6 | Poor Unit Performance. Check for blower motor, compressor, or electric heat operation. |
| C7 | Indoor Freezing Lockout (ICT – IAT > 20) +10 Min. Clean filter, Check for fan and blower operation, Check for Refrigerant loss or Restricted capillary tube. |
Amana Air Conditioner Troubleshooting:
Troubleshooting Chart for ECM Variable Speed Air Circulator Blower Motors
| Symptom | Possible Causes |
|---|---|
| Motor rocks slightly when starting | This is normal start-up for variable speed motor. |
| Motor won’t start | 1. No movement. 2. Motor rocks, but won’t start. |
| Motor oscillates up & down while being tested off of blower | It is normal for motor to oscillate with no load on shaft |
| Motor starts, but runs erratically | 1. Varies up and down or intermittent. 2. “Hunts” or “puffs” at high CFM (speed). |
| Excessive noise | 1.Air noise. 2.Noisy blower or cabinet. 3.”Hunts” or “puffs” at high CFM (speed). |
| Evidence of Moisture | Motor failure or malfunction has occurred and moisture is present |