Anallog Inputs Test; Fig. 72 - Analog Inputs Test Screen - York MAXE OPTIVIEW YK Service Instructions Manual

Diagnostics & Trou ble shoot ing
FIG. 72 – ANALOG INPUTS TEST SCREEN
This diagnostic is used to analyze the Analog Inputs to
the Microboard. The voltage level of each Analog in-
put, as in ter pret ed by the Microboard, is dis played. The
"Counts" listed for each pa ram e ter is the Analog-to-Dig-
ital (A/D) converter value and is for man u fac tur ing and
engineering use only.
If the chiller is shutting down on an Analog Safety or
is prevented from starting because of an Analog input,
there is probably an Analog Input problem. This Screen
can be used in the investigation of this problem.
Important! This test does not apply to the Leaving
Chilled Liquid Temperature analog input, Proximity
Probe DC Voltage reference or a 0-10VDC Remote
Setpoint input at channels 27 and 28.
The following is a list of the Analog inputs displayed.
Refer to the appropriate Section of this book for an ex-
pla na tion of each: Pressure Transducers - Section 17,
Thermistors - Section 18, Proximity Probe - Section
13, Refrigerant Level Control - Section 14, Solid State
Start er (Mod "A" only) - Section 11 and Cur rent Mod ule
(CM-2) - Sec tion 10.
Channel
0 - +2.5VDC Analog sup ply volt age reference.
Microboard TP6.
1 - Not Used
162
ANALOG INPUTS TEST
2 - Return Chilled Liquid Temperature
3 - Leaving Condenser Liquid Tem per a ture
4 - Return Condenser Liquid Temperature
5 - Drop Leg Refrigerant Temperature
6 - Discharge Temperature
7 - Oil Temperature
8 - Evaporator Refrigerant Temperature
9 - Condenser Pressure
10 - Evaporator Pressure
11 - Sump Oil Pressure
12 - Pump Oil Pressure
13 - Proximity Probe DC Voltage Reference
(Not applicable to "P" compressors and style F
and later chillers with "G" and "H5-8" compres
sors)
14 - Proximity Probe Position (Not applicable to "P"
compressors and style F and later chillers with
"G" and "H5-8" compressors)
15 - Solid State Starter/CM-2 MUX output Channel 0
16 - Solid State Starter/CM-2 MUX output Channel 1
17 - Solid State Starter/CM-2 MUX output Channel 2
18 - Solid State Starter/CM-2 MUX output Channel 3
19 - Solid State Starter/CM-2 MUX output Channel 4
20 - Solid State Starter/CM-2 MUX output Channel 5
21 - Solid State Starter/CM-2 MUX output Channel 6
FORM 160.54-M1(503)
00341VIP
YORK INTERNATIONAL