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ITEM
COOL
TEST COOLING
E.POS
Econo Damper Command Pos
SP.SP
Static Pressure Setpoint
CL.ST
Requested Cool Stage
MLV
Minimum Load Valve Relay
A1
Compressor A1 Relay
A1.CP
Compressor A1 Capacity
A1.B1
Two Circuit Start A1,B1
A2
Compressor A2 Relay
A3
Compressor A3 Relay
B1
Compressor B1 Relay
B2
Compressor B2 Relay
B3
Compressor B3 Relay
RHV
Humidimizer 3-Way Valve
C.EXV
Condenser EXV Position
B.EXV
Bypass EXV Position
HEAT
TEST HEATING
HT.ST
Requested Heat Stage
HT.1
Heat Relay 1
H1.CP
Modulating Heat Capacity
HT.2
Heat Relay 2
HT.3
Relay 3 W1 Gas Valve 2
HT.4
Relay 4 W2 Gas Valve 2
HT.5
Relay 5 W1 Gas Valve 3
HT.6
Relay 6 W2 Gas Valve 3
H.I.R
Heat Interlock Relay
HTC.C
Ht.Coil Command Position
Humidi-MiZer System
In the Humidi-MiZer (HMZR) sub-menu, it will be possible to
control and calibrate the Humidi-MiZer modulating valves (gas
bypass and condenser) while the unit's compressors are OFF. Cal-
ibration is a mode in which the unit software will first over-drive
each valve in the closing direction. This is to ensure that the valve
is completely shut and to establish the "zero" open position. The
controller then keeps track of the valve's position for normal oper-
ation. During this calibration phase, a light ratcheting sound may
be heard and will serve as proof of valve operation and closure.
Note that the calibration feature in Service Test is only provided as
an additional troubleshooting tool. The valves will automatically
go through the calibration process anytime the unit is powered
down, unit power is cycled, or anytime there is a loss of communi-
cation between the EXV board and the valve. There should be no
need to manually calibrate the valves under normal circumstances.
This sub-menu also allows manual manipulation of RHV (reheat
3-way valve), the bypass valve, and condenser valve. With the
compressors and outdoor fans off, the user should hear a light
ratcheting sound during movement of the two modulating valves.
The sound can serve as proof of valve operation.
SERVICE TEST
HMZR
VALVE)
On Humidi-MiZer equipped units, this item allows the user to
switch the reheat valve from ON to OFF or OFF to ON when
compressors are in the OFF position. When RHV is switched to
the ON position, the three-way valve will be energized. When
RHV is switched to the OFF position, the three-way valve will be
deenergized. To exercise this valve with a Circuit B compressor
commanded ON, go to (Service Test
the actual valve position at any time, the user can use the Outputs
menu (Outputs
COOL
RHV).
SERVICE TEST
HMZR
EXV POSITION)
On Humidi-MiZer equipped units, this item allows the user to ex-
ercise the valve that controls flow to the Circuit B condenser. The
valve default position is 100% (completely open). The user will be
Table 30 — Service Test (cont)
EXPANSION
RHV (HUMIDI-MIZER 3-WAY
COOL
RHV). To view
C.EXV (HMV-1: CONDENSER
RANGE
UNITS
0 to 100
%
0 to 5
"H2O
0 to n
ON/OFF
ON/OFF
20 to 100
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
0 to 100
%
0 to 100
%
0 to n
ON/OFF
0 to 100
%
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
0 to 100
%
able to adjust the valve from 0 to 100% through this function. As
confirmation that the valve is operational, the user should hear a
light ratcheting sound as the valve opens and closes. Note that this
function is only operational when Circuit B compressors are OFF.
To exercise this valve with a Circuit B compressor commanded
ON, go to Service Test
valve position at any time, the user can use the Outputs menu
(Outputs
COOL
C.EXV).
SERVICE TEST
HMZR
POSITION)
On Humidi-MiZer equipped units, this item allows the user to ex-
ercise the valve that controls discharge gas bypass around the Cir-
cuit B condenser. The valve default position is 0% (completely
closed). The user will be able to adjust the valve from 0 to 100%
through this function. As confirmation that the valve is operation-
al, the user should hear a light ratcheting sound as the valve opens
and closes. Note that this function is only operational when
Circuit B compressors are OFF. To exercise this valve when a Cir-
cuit B compressor is ON, go to (Service Test
To view the actual valve position at any time, the user can use the
Outputs menu (Outputs
SERVICE TEST
HMZR
CALIBRATE)
On Humidi-MiZer configured units, this item allows the user to
calibrate the valve that controls flow to the Circuit B condenser.
Switching C.CAL to ON will instruct the unit software to over-
drive the valve in the closing direction. This is to ensure that the
valve is completely shut and to establish the "zero" open position.
The controller then keeps track of the valve's position for normal
operation. During this calibration phase, a light ratcheting sound
may be heard and will serve as proof of valve operation and clo-
sure. Note that the calibration feature in Service Test is only pro-
vided as an additional troubleshooting tool. The valves will auto-
matically go through the calibration process anytime the unit is
powered down, unit power is cycled, or communication is lost be-
tween the EXV board and the valve. There should be no need to
manually calibrate the valves under normal circumstances.
40
CCN POINT
WRITE STATUS
ECONCOOL
SPSP_TST
CLST_TST
MLV_TST
CMPA1TST
A1CAPTST
CMPABTST
CMPA2TST
CMPA3TST
CMPB1TST
CMPB2TST
CMPB3TST
RHVH_TST
CEXVHTST
BEXVHTST
HTST_TST
HS1_TST
MGAS_TST
HS2_TST
HS3_TST
HS4_TST
HS5_TST
HS6_TST
HIR_TST
HTCLHEAT
COOL
C.EXV. To view the actual
B.EXV (HMV-2: BYPASS EXV
COOL
COOL
B.EXV).
C.CAL (CONDENSER EXV
B.EXV).
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Table of Contents
Troubleshooting
