Page 5
SECTION 5 - TROUBLESHOOTING
ERROR CODES
SYMPTOM | RULE OUT | RESOLUTION | |
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"FLO" |
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Insufficient water flow |
| Step 1: | |
through heater or | Insufficient Water Flow | Confirm water pump is on and water valves are in the correct position to allow | |
circulation pump is off |
| water to flow through Heat Pump. If error persists, proceed to next step. | |
| Filtration Dirty | Step 2: | |
| Confirm filtration system is clean. Backwash if needed. If error persists, | ||
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| proceed to next step. | |
| Possible Water | Step 3: | |
| Pressure Switch | Request Service | |
“CEr” Error |
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Communication Fault | N/A | Request Service | |
“CSE” Error |
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Control System Error | N/A | Request Service | |
“dPC” Error |
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Defrost Sensor Shorted | N/A | Request Service | |
“dPO” Error |
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Defrost Sensor Open | N/A | Request Service | |
“FS” Error |
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Unit in defrost mode. | Normal defrost mode | Step 1: | |
| If error persists after air temperature is over 50° F, request service. | ||
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“HP” Error |
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High Pressure. | Insufficient Water Flow | Step 1: | |
| Confirm water pump is on and water valves are in the correct position to allow | ||
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| water to flow through Heat Pump. If error persists, proceed to next step. | |
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| Step 2: | |
| Filtration Dirty | Confirm filtration system is clean. Backwash if needed. If error persists, | |
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| proceed to next step. | |
| Possible Refrigerant | Step 3: | |
| Issue | Request Service | |
“HP5” Error |
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Equipment has | Insufficient Water Flow | Step 1: | |
registered high pressure | Follow steps outlined in “HP” error, then reset circuit breaker to clear error. If | ||
and/or Filtration Dirty | |||
five times and locked. | error persists, request service. | ||
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“LP” Error |
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Refrigerant Issue | N/A | Request Service | |
“LP5” Error |
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Refrigerant Issue | N/A | Request Service | |
“OTA” |
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Over Temperature |
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Alarm | Other heating | Check if alternate heater (such as a solar heater) is heating water leading to | |
| heat pump. If “yes”, turn off alternate heater and check if error clears. If error | ||
| equipment | ||
Temperature over | persists, request service. | ||
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110° F (Unit Locked) |
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“PC” Error |
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Water Temperature | N/A | Request Service | |
Sensor Shorted | |||
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“PO” Error |
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Water Temperature | N/A | Request Service | |
Sensor Open | |||
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