Carrier 48/50PG Series - Page 29

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The following forced operating states are changed or added to the
available service test operation for a Humidi-MiZer equipped unit:
Service Test→COOL→CMP.A (Cool A Test)
A value of On will turn on circuit A in Normal Cooling mode.
Service Test→COOL→CMP.B (Cool B Test)
A value of On will turn on circuits A and B in Normal Cooling
mode.
Service Test→COOL→CMP.C(CoolCTest)
A value of On will turn on circuits A and C in Normal Cooling
mode.
Service T est→HMZR→RH1.A (Re he at 1 A Test )
A value of On will turn on circuit A in Reheat1 mode.
Service T est→HMZR→RH1.B (Re he at 1 B Test )
A value of On will turn on circuits A and B in Reheat1 mode.
Service T est→HMZR→RH1.C (Re he at 1 C Test )
A value of On will turn on circuits A and C in Reheat 1 mode.
Service T est→HMZR→RH2.A (Re he at 2 A Test )
A value of On will turn on circuit A in Reheat2 mode.
Service T est→HMZR→RH2.B (Re he at 2 B, C Test )
A value of On will turn on circuits A B and C in Reheat2 mode.
Service Test→HMZR→CRC (Cool-Reheat1 Valve Test)
For 48/50PG03--16 units, a value of On will turn on the CRC
relay . This will turn on CV.x valves and turn of f RH1.x valves.
For 48/50PG20--28 and 48/50PM16 --28 units, a value of On will
turn on the CRC relay. This will energize RH.1 and RH.B.
Service Test→HMZR→RHV.A (Reheat2 Valve A Test)
A value of On will turn on the RH2.A valve.
Service Test→HMZR→RHV.B (Reheat2 Valve B,C Test)
A value of On will turn on the RH2.B and RH2.C valves.
Service Test→Fans→OFC.1 (Outdo or Fan 1 Test)
For 48/50PG03-- 14: not used. For 48/50PG16 only: a value of On
will turn on the OFC relay only which controls status of fans 1 and
3; but fans are not powered unless compressor A contactor is on.
For 48/50PG20--28 and 48/50PM16--28: Turning on OFC1,
provides power to the Motormaster controller. Outdoor fans 1 and
4 will operate under the control of the Motormaster controller.
Service Test→Fans→OFC.2 (Outdo or Fan 2 Test)
For 48/50PG03 --16: Not used. For 48/50PG20--28 and
48/50PM16-- 28: Turn on OFC2. Outdoor fans 2, 3, 5, and 6 will
operate.
Service Test→Fans→OFC.3 (Outdo or Fan 1 Test)
Not u sed.
Service Test→I
NDP→CCH
(Crankcase Heat Test)
Not used. Compressor crankcase heaters are wired directly to line
power.
RH1A
CVA
RH2A
LEGEND
CV -- Cooling Valve
RH -- Reheat Valve
C07007
Fig. 15 -- Humidi--MiZert System Va lve Locations
48/50PG03--07
RH1B
CVB
RH2B
RH1A
CVA
RH2A
LEGEND
CV -- Cooling Valve
RH -- Reheat Valve
C07006
Fig. 16 -- Humidi--MiZert System Va lve Locations
48/50PG08--14
48/50PG and PM