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1. |
Turn power off, unplug the unit. |
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2. |
Open control panel. |
| 3. |
Check switch to be replaced, loosen the terminals and remove wiring.
(Note) When disconnecting wires, write down wire numbers and positions |
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4. |
Remove the over current relay (OCR) section.
(Note) Motor contactors use over current relays, heaters do not. |
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5. |
Remove it by unscrewing the upper terminals from the contractor above.
Locate the release tab the contactor and push down to release it. |
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6. |
While pulling down, pull forward, then remove relay by holding upward. |
| 7. |
Install new relays.
(Contrary to #6 above, hook top section to rails, then fit bottom section by pushing this onto rails) |
| 8. |
Rewire.
(Securely tighten all wires. If loose, terminals may burn due to heat) |
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9. |
Check / confirm set value of over current relay, turn dial to specified current value. |
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Note for Safety:
Before starting work, always make sure operations have been stopped and that the breakers are turned off, and the unit is unplugged.
Please have only qualified personnel attempt work. |
