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Service Access to Heaters
If service access to the heater is required, it is
accomplished by removing the control cover panel and
service access panel (Figure 61) to provide a wide access
to get to (1) compressor, (2) heat exchanger, (3) thermal
expansion valve (TXV), (4) reversing valve/solenoid valve
(if equipped), (5) flow switch (if equipped), and (6) sensors
(water, ambient and coil). To gain access, follow the steps
below:
1. Shut off all power to the unit to avoid any possibility
of electrical shock or damage to components.
2. Remove the heater's front control cover panel by
unscrewing the six (6) screws using a 1/4" hex head
screwdriver. See Figure 61.
Figure 61. Sheet Metal Screws to Remove Control Panel
3. Pull the front panel's bottom down and outward.
Disconnect the wire attached to the rear of the user
interface. The panel is now free for removal.
4. Set the control panel cover aside to reinstall when
service is completed.
5. Install service access panel and slide control cover
panel up to its place and secure with screws removed
in Step 2.
6. Turn ON power and start operation as needed.
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