48/50PG and PM
SERVICE TEST
The Service Test function can be used to verify proper operation of compressors, heating stages, Humidi−MiZert System, indoor fan, outdoor fans, power exhaust fans, economizer, crankcase heaters, and the alarm relay. Use of Service Test is recommended at initial system start up and during troubleshooting (See Table 4 for point details).
Service Test mode has the following changes from normal operation:
SOutdoor air temperature limits for cooling circuits, economizer, and heating are ignored. Normal compressor time guards and other staging delays are reduced to 30 seconds or less.
SCircuit alerts are limited to 1 strike (versus 3) before changing to alarm shut down state.
SThe status of ALM.N is ignored so all alerts and alarms are broadcast on CCN.
SThe words “SERVICE TEST” are inserted into every alarm message.
Service test can only be turned ON/OFF at the unit display. Once turned ON, other entries may be made with the display or through CCN. To turn Service Test on, change the value of TEST to ON. To turn service test off, change the value of TEST to OFF.
NOTE: Service Test mode may be password protected. Refer to Basic Control Usage section for more information. Depending on the unit model, factory−installed options, and field−installed accessories, some of the Service Test functions may not apply.
Independent Outputs
The independent (INDP) submenu is used to change output status for the economizer, power exhaust stages, crankcase heaters, alarm relay, and outside air unit.. These independent outputs can operate simultaneously with other Service Test modes. All outputs return to normal operation when Service Test is turned off. When the economizer is using the factory default Digital Control Type (Configuration→ECON→E.CTL is 1 or 2) then the Economizer Calibration feature may be used to automatically check and reset the economizer actuator range of motion. Refer to the economizer operation section of more details. On EnergyX equipped units, use the outside air unit (OAU) points to test the ERV components.
Fan Test
The fans (FANS) submenu is used to change output status for the indoor fan and outdoor fan stages. Indoor fan speed test (F.SPD) is only available for use when adaptive fan is configured (Configuration→A.FAN→AF.EN) for Yes. F.SPD runs the fan at the desired speed entered. Units with Humidi−MiZer systems have limited or no manual outdoor fan control from test mode.
Cooling Test
The cooling (COOL) submenu is used to change output status for the individual compressors. Compressor starts are staggered by 15 seconds. The fans (FANS) and heating (HEAT) service test outputs are reset to OFF for the cooling service test. Indoor fans and outdoor fans are controlled normally to maintain proper unit operation. If adaptive fan is configured, then the indoor fan speed will default to the Mech. Cooling Fan Speed configuration point (Configuration→A.FAN→FS.CL) when one compressor is turned on. The Reduced Cool Fan Speed (F.SPD) can only be changed while one stage is running. If more then one stage is on the actual fan speed will be 100%. F.SPD shows the reduced speed not actual speed. On single stage units, actual fan speed will be 100% when the compressor is on. All normal cooling alarms and alerts are functional.
When charging unit, all outdoor fans may be forced on in cooling service test modes by setting the Outdoor Fan Override (OF.OV) to on.
NOTE: Circuit A is always operated with Circuit B and/or C in
Humidi−MiZert Test
For units with the factory
NOTE: Circuit A is always operated with Circuit B and/or C in
Table 4 – Service Test Modes and Submodes Directory
DISPLAY MENU/ |
|
|
EXPANDED NAME | VALUES | |
NAME |
|
|
SERVICE TEST |
|
|
TEST | Field Service Test Mode | Off/On |
INDP | Test Independent Outputs |
|
ECON | Economizer Position Test | 0 to 100 |
E.CAL | Calibrate Economizer | Off/On |
PE.1 | Power Exhaust 1 Test | Off/On |
PE.2 | Power Exhaust 2 Test | Off/On |
ALRM | Alarm Relay Test | Off/On |
CCH | Crankcase Heat Test | Off/On |
OA.DM | OAU 2position Damper | Close/Open |
WHL | OAU Wheel Test | 0 to 100 |
OA.OF | OAU OA Fan Speed Test | 0 to100 |
OA.XF | OAU PE Fan Speed Test | 0 to100 |
OA.HT | OAU Tempring Heater Test | 0 to 100 |
FANS | Test Fans |
|
IDF | Indoor Fan Power Test | Off/On |
F.SPD | Indoor Fan Speed Test | 0 to 100 |
OFC.1 | Outdoor Fan 1 Test | Off/On |
OFC.2 | Outdoor Fan 2 Test | Off/On |
OFC.3 | Outdoor Fan 3 Test | Off/On |
COOL | Test Cooling |
|
CMP.A | Cool A Test | Off/On |
CMP.B | Cool B Test | Off/On |
CMP.C | Cool C Test | Off/On |
F.SPD | Reduced Cool Fan Speed | 60 to 100 |
OF.OV | Outdoor Fan Override | Off/On |
HMZR | Test |
|
RH1.A | Reheat1 A Test | Off/On |
RH1.B | Reheat1 B Test | Off/On |
RH1.C | Reheat1 C Test | Off/On |
RH2.A | Reheat2 A Test | Off/On |
RH2.B | Reheat2 B Test | Off/On |
RH2.C | Reheat2 C Test | Off/On |
F.SPD | Reheat2 Fan Speed | 65 to 100 |
CRC | Cool>Reheat1 Valve Test | Off/On |
RHV.A | Reheat2 Valve A Test | Off/On |
RHV.B | Reheat2 Valve B,C Test | Off/On |
HEAT | Test Heating |
|
HT.1 | Heat Stage 1 Test | Off/On |
HT.2 | Heat Stage 2 Test | Off/On |
F.SPD | Reduced Heat Fan Speed | 65 to 100 |
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