YORK INTERNATIONAL
FORM 150.63-NM1
105
°
3
This display is for chiller applications only and does
not apply to condensing units. However, the evapora-
tor contacts could be used to control the air handler.
Refer to the Unit Operation section under Evaporator
Control Contacts.
The evaporator pump dry contacts are energized when
any compressor is running, or the unit is not OFF on
the daily schedule and the unit switch is on. However,
even if one of above is true, the contacts will not close
if the micropanel has been powered up for less than 30
seconds or if the contacts have been closed in the last
30 seconds to prevent motor overheating.
There are several types of remote systems that can be
used to control or monitor the unit. The following mes-
sages indicate the type of remote control mode active:
NONE – No remote control active. Remote
monitoring may be via ISN
ISN – YorkTalk via ISN (Remote Mode)
*LOAD LIM – Load Limiting enabled. Can be either
stage 1 or stage 2 of limiting.
*PWM TEMP – EMS-PWM temperature reset
*
Refer to the section on Operating Controls
The above four message will appear sequentially, first
for system 1, then for system 2.
The first message indicates the system and number of
compressors that are being commanded on by the mi-
cro board.
The second message indicates the system run time in
days – hours – minutes – seconds. Please note that this
is not accumulated run time but pertains only to the
current system cycle.
The third message indicates the system, and whether
the liquid line solenoid and hot gas solenoid are being
commanded on by the micro board. Please note that
hot gas in not available for system 2, so there is no
message pertaining to the hot gas solenoid when sys-
tem 2 message is displayed.
The fourth message indicates what stage of condenser
fan operation is active. Unless a low ambient kit is added,
only stages 1 and 2 will be used to cycle the condenser
fans. However, stage 3 may be shown in this display
without a low ambient kit added, but it has no effect.
See the section on Condenser Fan Control in the Unit
Operation section.
E V A P
P U M P
I S
O N
E V A P
H E A T E R
I S
O F F
A C T I V E
R E M O T E
C T R L
N O N E
S Y S
X
R U N T I M E
X X - X X - X X - X X
D - H - M - S
S Y S
X
N U M B E R
O F
C O M P S
R U N N I N G
X
S Y S
X
L L S V
I S
O N
H O T
G A S
S O L
I S
O F F
S Y S
X
F A N
S T A G E
3
Summary of Contents for MILLENNIUM YCUL0016SC
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