23
2) Preceding condition is
a) The first step is “the accumulated compressor on time is greater than 30
minutes.”
b) Second step is the one of below two
-The first condition ; If Real-Delta>Defrost-Delta for 60 continuous seconds and
the following conditions are all true then defrost initiates.
)The outdoor coil temperature<-2
°
C
)The compressor has been on continuously for 15 minutes.
OR
-The second condition ; If the outdoor coil temperature is less than -20
°
C and
the following conditions are all true then defrost initiates.
)The outdoor fan has been on continuously for 60 seconds.
)The compressor has been on continuously for 3 minutes.
• Defrost mode
The normal system operations are stopped and the system operates as follows.
a) The indoor fan, outdoor fan will be de-energized.
b) The compressor and R.V.S. will be energized.
• Defrost termination
The defrost cycle will terminate in one of the following cases.
a) The outdoor coil temperature is greater than or equal to +25
°
C.
b) 10 minutes after the start of defrost cycle.
• Auto refresh
During normal heating operation, if the unit becomes OFF mode condition, then
defrost mode will be performed at the OFF mode state of louver and display when
the second step of preceding conditions is satisfied regardless of first step.
Self-Diagnostic Function
The control will contain diagnostic test to verify the integrity of the system.
Once a malfunction is detected, the diagnostic control section will force the system mode
to OFF for 3 minutes. After the OFF delay, system mode is released and allowed to return
to its normal state. The system will be allowed to restart on its own. The diagnostic control
section will allow the system to fail 5 consecutive times before shutting down the system.
The lamp is scanned every half second and the error codes are displayed by the
flashing frequency of lamp. The error codes are displayed during SHUT-OFF (3
minutes off and after the 5th retry failure) as follows.
Summary of Contents for HWG195C
Page 36: ...35 CONTROL BLOCK DIAGRAM 6 1 42HWG007 009 012 018 024 HWG195C 225C 305C 455C 605C...
Page 37: ...2 42HQG007 009 012 018 024 HWG195 225 305 455 605H SERIES 36...
Page 43: ...b MAIN CONTROL PART 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H 42...
Page 45: ...c REMOTE CONTROL PART 44...
Page 48: ...47 c CONTROL PCB SOLDERING SIDE 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H...
Page 49: ...48 d CONTROL PCB COMPONENTS SIDE 42HWG018 024 42HQG018 024 HWG455 605C HWG455 605H...
Page 60: ...59 TROUBLE SHOOTING 10...
Page 64: ...EXPLODED DIAGRAM AND PARTS LIST 12 63...
Page 89: ...Carrier Corporation P N 42KG8K54600 Version 1 0...