York Millennium YCAS 316, Installation Operation & Maintenance, Page: 117 / 144

FORM 201.10-NM1
117
YORK INTERNATIONAL
This message informs the operator that the micro senses
the outdoor ambient temperature is below 40°F and is
commanding the Evaporator Heater to turn on. Once
turned on, the heater will turn off at 45°F.
This message displays the accumulated Run Time on
SYS 1 since the last start.
This time is recorded in Days (D), Hours (H), Minutes
(M), and Seconds (S).
This message informs the operator that the SYS 1 Liq-
uid Line Solenoid is “OFF” (De-energized/Closed) or “ON”
(Energized/Open).
This message informs the operator that the micro is or is
not activating the liquid injection valve for SYS 1 for oil
cooling.
This message informs the operator of the number of for-
ward running pairs of condenser fans on SYS 1.
This message informs the operator whether the pair of
reversing condenser fans are running on SYS 1.
This message displays the accumulated Run Time on
SYS 2 since the last start.
This time is recorded in Days (D), Hours (H), Minutes
(M), and Seconds (S).
This message informs the operator that the SYS 2 Liq-
uid Line Solenoid is “OFF” (De-energized/Closed) or “ON”
(Energized/Open).
This message informs the operator that the micro is or is
not activating the liquid injection valve for SYS 2 for oil
cooling.
This message informs the operator of the number of for-
ward running pairs of condenser fans on SYS 2.
This message informs the operator whether the pair of
reversing fans are running on SYS 2.
History
The HISTORY key also allows the user to scroll through
the SAFETY SHUTDOWN display information relating
to the last 9 Safety Shutdowns which occurred. Informa-
tion contained in the micro’s SAFETY SHUTDOWN buff-
ers is very important when attempting to troubleshoot a
system problem. This data reflects system conditions at
the instant the fault occurred.
Information is stored in the SAFETY SHUTDOWN buff-
ers on every fault regardless of whether the fault caused
a Lockout to occur. The stored information is also not
affected by power failures (long term internal battery back-
up is built into the printed circuit board) or manual reset-
ting of a fault lock-out.
When the HISTORY key is pressed, the following mes-
sage will appear:
The operator must select which of the last three SAFETY
SHUTDOWN’s is desired. When deciding this, keep in
mind that SAFETY SHUTDOWN No. 1 is always the most
recent fault. As new fault information is stored, it is as-
signed as No. 1, No. 1 is assigned to No. 2, No. 2 is
assigned to No. 3, up to No. 9, and information stored
previously as No. 9 is discarded.
To select a SAFETY SHUTDOWN, simply press a “1”,
“2”, “3”, etc. key and press ENTER. Repetitively press-
ing the ENTER key will allow the operator to scroll through
the information available in the SAFETY SHUTDOWN
buffer.
E V A P O R A T O R H E A T E R
S T A T U S O F F
S Y S 1 R U N T I M E
0 - 3 - 4 8 - 1 7 D - H - M - S
S Y S 1 L I Q U I D L I N E
S O L E N O I D S T A T U S O N
S Y S 1 L I Q U I D
I N J E C T I O N V A L V E O N
S Y S 1 F O R W A R D F A N S
S T A T U S 2
S Y S 1 R E V E R S E F A N
S T A T U S O F F
S Y S 2 R U N T I M E
1 - 1 2 - 6 - 5 D - H - M - S
S Y S 2 L I Q U I D L I N E
S O L E N O I D S T A T U S O N
S Y S 2 L I Q U I D
I N J E C T I O N V A L V E O F F
S Y S 2 F O R W A R D F A N S
S T A T U S O F F
S Y S 2 R E V E R S E F A N
S T A T U S O F F
HISTORY
D I S P L A Y S A F E T Y S H U T -
D O W N N O . 1 ( 1 T O 9 )