Operation Section
33
5.8 Relay Board
• The relay board contains the compressor and fan on relays, in addition to a step-down
transformer that converts the line voltage (215/220 VAC) to 12 V. This voltage is then converted
from AC to DC and used for relay coil activation. The 12 V (DC) power is sent to the control panel
assembly, further being reduced to 5 V for the system logic. Lastly, the relay board also contains
the dip switch.
(1) Relay board fuse
• The relay board fuse is the only serviceable component on the relay board assembly. This fuse
provides protection against damage to the step-down transformer. The fuse must be replaced
with the exact same part, or a suitable equivalent.
Specifications:
- 5 A 250 VAC
CAUTION
Failure to use the exact same fuse may result in damage to the unit and/or components, and will
also void the unit warranty.
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