Reheat Mode Diagnostic Help; Humidi−Mizert System Valve Locations - Carrier 48/50PG C03-14 Operation And Service Manual

Reheat Mode Diagnostic Help

The status of reheat mode sensor inputs may be viewed within the
display Inputs menu. The status of reheat mode outputs may be
viewed within the display Outputs or Run Status→COOL menus.
Additional diagnostic help, including status of circuit reheat
temperature limit lockouts may be viewed within the
Humidi-MiZer sub-menu of the cooling mode diagnostic table at
Operating Modes→COOL→HMZR.
The Service Test mode may be used to force the system to operate
in various stages of Reheat1 or Reheat2 mode, or to independently
operate the reheat valve control outputs. Fig. 15−19 show the
valve locations of Humidi−MiZer equipped units.
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 (Cool C Test)
A value of On will turn on circuits A and C in Normal Cooling
mode.
Service Test"HMZR"RH1.A (Reheat1 A Test)
A value of On will turn on circuit A in Reheat1 mode.
Service Test"HMZR"RH1.B (Reheat1 B Test)
A value of On will turn on circuits A and B in Reheat1 mode.
Service Test"HMZR"RH1.C (Reheat1 C Test)
A value of On will turn on circuits A and C in Reheat 1 mode.
Service Test"HMZR"RH2.A (Reheat2 A Test)
A value of On will turn on circuit A in Reheat2 mode.
Service Test"HMZR"RH2.B (Reheat2 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 off 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 (Outdoor 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 (Outdoor Fan 2 Test)
For 48/50PG03−16: Not
48/50PM16−28: Turn on OFC2. Outdoor fans 2, 3, 5, and 6 will
operate.
Service Test"Fans"OFC.3 (Outdoor Fan 1 Test)
Not used.
Service Test"INDP"CCH (Crankcase Heat Test)
Not used. Compressor crankcase heaters are wired directly to line
power.
used. For 48/50PG20−28 and
LEGEND
CV -- Cooling Valve
RH -- Reheat Valve
Fig. 15 − Humidi−MiZert System Valve Locations
48/50PG03−07
LEGEND
CV -- Cooling Valve
RH -- Reheat Valve
Fig. 16 − Humidi−MiZert System Valve Locations
48/50PG08−14
29
RH1A
CVA
RH2A
RH1B
CVB
RH2B
RH1A
CVA
RH2A