TROUBLESHOOTING
WARNING
To avoid any injury or damage, the booster heater must only be serviced by qualified personnel.
WARNING
To avoid any injury or damage to the booster heater turn the power OFF at the disconnect switch/circuit breaker and allow to cool before performing any maintenance.
SYMPTOM | PROBABLE CAUSE | CORRECTIVE ACTION |
|
|
|
High temperature limit trips. | Temperature limit set too low. | If booster heater is not overheating, |
|
| replace High Limit Safety Switch. |
|
|
|
| Thermostat set too high. | Adjust or recalibrate (page 27) to proper |
|
| temperature. |
|
|
|
| Incoming water temperature | Incoming water temperature should |
| too high causing nuisance | not be higher than 160°F (71°C). |
| tripping of high temperature |
|
| limit switch. |
|
|
|
|
Chattering contactor or low | Loose connections or wire | Tighten all connections and check crimps. |
water cutoff circuit board. | connection has insulation |
|
| under crimp. |
|
|
|
|
| Low voltage. | Check control circuit voltage or secondary |
| voltage with transformer. | |
|
| |
|
|
|
| Probe may be fouled. | Bypass probe by removing wire from low |
| water cutoff probe and grounding to tank. | |
|
| |
|
| Clean or replace probe if chattering stops. |
|
|
|
| Contactor(s) may be bad. | Test contactor coils. Replace contactor(s) |
|
| if bad. |
|
|
|
33 | Form No. |
