65
13. SPECIAL PRECAUTIONS WHEN SERVICING THE UNIT
Important!
For your personal safety, be sure to read and understand the following
precautions before servicing.
● To avoid risk of injury when servicing the outdoor unit (for instance, when replacing the compressor or repair-
ing a refrigerant leak), follow the procedure below for the refrigerant circuits of the outdoor unit.
PROCEDURE
13-1. BLK/WHT Connector Attachment for Servicing
13-1-1. Confirm mains power is switched OFF, then, detach the connectors (BLK and WHT) for the electromag-
netic valves, SV1 and SV2, from the terminals CN4 and CN6 on the PCB.
13-1-2. Connect the special connector (field supply) and the connector (BLK and WHT). Following this, re-apply
power at 115V and open the electromagnetic valves, SV1 and SV2.
13-1-3. Provide a disconnect switch to the special connector.
13-1-4. Turn the disconnect switch ON to supply power (single-phase, 115V) to the special connector. This
makes it possible to force open 2 solenoid valves (SV1 and SV2) in the refrigeration circuit outdoor unit.
(Fig. 3)
Injuries can occur from burns or inhalation of toxic gas if servicing is per-
formed while refrigerant remains in the refrigeration circuit. This servicing
includes disassembling brazed tubing connections and removing any
refrigeration parts or components.