Table 15. Compressor Fault and Lockout LED Codes and Related icomfort Touch® Thermostat Alert Codes
NOTE able below for duration of fast / slow flashes and pause.
Heat Pump Control | icomfort |
|
|
|
|
| ||
LEDs |
|
|
|
|
|
| ||
| Touch® |
| Possible |
|
|
| ||
|
|
| Condition | Solution | Clearing Status | |||
DS15 |
| DS13 | Thermostat | Cause(s) | ||||
|
|
|
|
| ||||
Yellow |
| Red | Display |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 | Compressor protector is open. |
|
|
|
|
|
|
|
| S Check for high head pressure | Clears the error |
|
|
|
|
| Thermostat |
| S Check compressor supply voltage | after current is |
|
|
|
|
| 2 Outdoor unit power disconnect is open. | sensed in the | ||
|
|
| Moderate/ | Compressor | demand signal Y1 | |||
Off |
| On | Critical3 Alert | internal | is present, but | 3 Compressor circuit breaker or fuse(s) is open. | run and start | |
| winding for two | |||||||
|
|
| Code 400 | overload trip | compressor not | 4 |
| |
|
|
| Broken wire or connector is not making contact. | seconds, ser- | ||||
|
|
|
|
| running | 5 | Low or high pressure switch open if present in the | vice removed or |
|
|
|
|
|
| |||
|
|
|
|
|
|
| system. | power reset. |
|
|
|
|
|
| 6 | Compressor contactor has failed to close. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 | Low refrigerant charge. |
|
|
|
|
|
|
| 2 | Evaporator blower is not running. |
|
|
|
|
|
|
|
| S Check blower relay coil and contacts |
|
|
|
|
|
|
|
| S Check blower motor capacitor |
|
|
|
|
|
|
|
| S Check blower motor for failure or blockage |
|
|
|
|
|
|
|
| S Check evaporator blower wiring and connec- |
|
|
|
|
|
|
|
| tors |
|
|
|
|
|
|
|
| S Check indoor blower control |
|
|
|
|
|
|
|
| S Check thermostat wiring for open circuit |
|
|
|
|
|
|
| 3 | Evaporator coil is frozen. |
|
|
|
|
|
|
|
| S Check for low suction pressure |
|
|
|
|
|
|
|
| S Check for excessively low thermostat setting | Clears the error |
1 flash |
|
| Critical Alert |
| Compressor is |
| S Check evaporator airflow (coil blockages or re- | after 30 consec- |
| Off | Long run time. | running extremely |
| turn air filter) | utive normal run | ||
then pause |
| Code 401 |
| |||||
|
|
| long run cycles. |
|
| cycles, or after | ||
|
|
|
|
|
| S Check ductwork or registers for blockage. | ||
|
|
|
|
|
|
| power reset. | |
|
|
|
|
|
| 4 | Faulty metering device. | |
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| S Check TXV bulb installation (size, location and |
|
|
|
|
|
|
|
| contact) |
|
|
|
|
|
|
|
| S Check if TXV/fixed orifice is stuck closed or de- |
|
|
|
|
|
|
|
| fective |
|
|
|
|
|
|
| 5 | Condenser coil is dirty. |
|
|
|
|
|
|
| 6 | Liquid line restriction (filter drier blocked if present). |
|
|
|
|
|
|
| 7 | Thermostat is malfunctioning. |
|
|
|
|
|
|
|
| S Check thermostat sub−base or wiring for short |
|
|
|
|
|
|
|
| circuit |
|
|
|
|
|
|
|
| S Check thermostat installation (location and lev- |
|
|
|
|
|
|
|
| el) |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 | High head pressure. |
|
|
|
|
|
|
|
| S Check high pressure switch if present in sys- |
|
|
|
|
|
|
|
| tem |
|
|
|
|
|
| Indicates the |
| S Check if system is overcharged with refrigerant | Clears after four |
|
|
|
|
|
| S Check for non−condensable in system | ||
|
|
|
|
| compressor |
| consecutive | |
|
|
|
|
| 2 Condenser coil poor air circulation (dirty, blocked, | |||
2 flashes |
| Off | Critical Alert | System | protector is open | normal com- | ||
then pause |
| Code 402 | pressure trip | or missing supply |
| damaged). | pressor run | |
|
|
| ||||||
|
|
|
|
| power to the | 3 Condenser fan is not running. | cycles, or after | |
|
|
|
|
| compressor. |
| S Check fan capacitor | power reset. |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
| S Check fan wiring and connectors |
|
|
|
|
|
|
|
| S Check fan motor for failure or blockage |
|
|
|
|
|
|
| 4 | Return air duct has substantial leakage. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 | Thermostat demand signal is intermittent. | Clears after four |
|
|
| Moderate |
| Compressor is | consecutive | ||
|
|
|
| 2 |
| |||
3 flashes |
|
|
| Time delay relay or heat pump control is defective. | normal com- | |||
| Off | Alert Code | Short cycling | running less than | ||||
then pause |
| 3 | If high pressure switch is present, see flash code 2 | pressor run | ||||
|
| 403 |
| three minutes. | ||||
|
|
|
|
| information. | cycles, or after | ||
|
|
|
|
|
|
| ||
|
|
|
|
|
|
| power reset. | |
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
Page 43
XP17 SERIES
