Daikin RZQ100B8V3B Service Manual page 221

ESIE05-03
3.10 Malfunctioning HPS System (H3)
H3
Remote Controller
Display
Method of The protection device circuit checks continuity in the high pressure switch.
Malfunction
Detection
Malfunction When there is no continuity in the high pressure switch during compressor stops operating.
Decision
Conditions
Supposed Causes
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Part 3 – Troubleshooting
Incomplete high pressure switch
Disconnection in high pressure switch harness
Faulty connection of high pressure switch connector
Faulty outdoor unit PC board
Disconnected lead wire
Is
protection HPS
connector (*1) correctly
connected to outdoor
unit PC board?
YES
Wait for 10 minutes after
the unit stops operating,
then check the following.
Is there
continuity in each
protection HPS?
YES
Is there
continuity in lead
wire?
YES
*1 Connector symbol
RZQ71 : X60A (A2P)
RZQ100 ~ 140 : X32A (A1P)
NO
NO
NO
Error Codes: Outdoor Units
Connect correctly.
Replace HPS with no continuity.
Resistance in normal operation :
10Ω or less
Replace the lead wire.
Replace the outdoor unit PC
board.
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