Carrier 50HCQ04---12, Инструкции по обслуживанию и техническому обслуживанию

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5. Remove two slot fillers in the bottom of the cover to per-
mit service tool cords to exit the cover.
6. Check cover installation for full closing and latching.
Fig. 32 — Weatherproof Cover Installation
Maintenance
Periodically test the GFCI receptacle by pressing the TEST
button on the face of the receptacle. This should cause the in-
ternal circuit of the receptacle to trip and open the receptacle.
Check for proper grounding wires and power line phasing if
the GFCI receptacle does not trip as required. Press the RESET
button to clear the tripped condition.
Fuse on Powered Type
The factory fuse is a Bussmann
1
Fusetron T-15, non-renewable
screw-in (Edison base) type plug fuse.
Using Unit-Mounted Convenience Outlets
Units with unit-mounted convenience outlet circuits will often
require that two disconnects be opened to de-energize all pow-
er to the unit. Treat all units as electrically energized until the
convenience outlet power is also checked and de-energization
is confirmed. Observe National Electrical Code Article 210,
Branch Circuits, for use of convenience outlets.
HEAT PUMP CONTROLS
Central Terminal Board
The Central Terminal Board (CTB) is a large printed circuit
board that is located in the center of the unit control box. This
printed circuit board contains multiple termination strips and
connectors to simplify factory control box wiring and field
control connections. Terminals are clearly marked on the board
surface. See Fig 33.
The CTB contains no software and no logic. But it does in-
clude seven configuration jumpers that are cut to configure the
board to read external optional and accessory controls, includ-
ing that the unit is a heat pump. See Table 7.
Fig. 33 — Central Terminal Board (CTB)
Table 7 — Jumper Configuration
Jumpers JMP5, JMP6 and JMP7 are located in notches across
the top of the CTB. See Fig. 33. These jumpers are factory cut
on all heat pump units. Visually check these jumpers to con-
firm that they have been cut.
PROTECTIVE CONTROLS
Compressor Protection
OVERCURRENT
The compressor has internal line-break motor protection.
OVERTEMPERATURE
The compressor has an internal protector to protect it against
excessively high discharge gas temperatures.
COVER - WHILE-IN-U S E
WEATHERPROOF
BA S EPLATE FOR
GFCI RECEPTACLE
GA S KET
GFCI RECEPTACLE
NOT INCLUDED
TOP
TO
P
TOP
WET LOC
ATIONS
W
ET
L
OC
ATI
ON
S
JUMPER CONTROL FUNCTION NOTE
JMP1 Phase Monitor
JMP2 Occupancy Control
JMP3 Smoke Detector Shutdown
JMP4 Remote Shutdown
JMP5 Heat Pump / Reheat 50HCQ default: Cut
JMP6 Heat Pump / Reheat 50HCQ default: Cut
JMP7 Heat Pump / Reheat 50HCQ default: Cut
X
C
R
G
W2
W1
Y2
Y1
X
C
R
G
W2
W1
Y2
Y1
S P H S P L
CIRCUIT 1
LP S
HP S
CIRCUIT 2
R C
T- S TAT
DDC T
-
S
TA
T
DDC
OCCUPANCY
C
U
T
F
O
R
S MOKE ALARM
CUT FOR
S MOKE
DETECTOR
S MOKE
S HUT-
DOWN
REMOTE
S HUTDOWN
U
N
I
T
S
H
U
T
D
O
W
N
W
I
R
I
I
N
G
24V
OUT
CUT FOR
REMOTE
S HUTDOWN
S
A
T/OA
T
CL
O/COM
P
ECON
REHEA
T/HP
CONTROL
BOARD
PMR
CL
O/COM
P CUT
FOR PMR
CUT FOR
REHEAT/HP
CUT FOR
REHEAT/HP
1. Bussman and Fusetron are trademarks of Cooper Technologies
Company.