York YCAL0043E Series, Установка, эксплуатация и обслуживание, Страница: 74 / 184

YORK INTERNATIONAL
74
FORM 150.62-NM7 (103)
*LOAD LIM – load limiting enabled. Can be ei ther
stage 1 or stage 2 of limiting.
*PWM TEMP – EMS-PWM temperature reset
*Refer to the section on OPERATING CONTROLS
If the micro is programmed for CURRENT FEEDBACK
ONE PER UNIT under the OPTIONS Key, the display will
show up as the fi rst display prior to the SYS 1 dis plays.
Total chiller current is displayed as shown below:
If the micro is programmed for CURRENT FEEDBACK
NONE, no current display will appear.
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
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 C O M P S T A T U S
1 = X X X 2 = X X X 3 = X X 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 A M P S = 3 6 . 0
V O L T S = 0 . 8
This display indicates the status of the evap o ra tor pump
con tacts and the evaporator heater.
The evap o ra tor pump dry con tacts are en er gized when
any com pres sor is running, or the unit is not OFF on the
daily schedule and the unit switch is on, or the unit has
shutdown on a Low Leaving Chilled Liquid fault. How-
ev er, even if one of above is true, the pump will not run
if the micro panel has been pow ered up for less than 30
seconds or if the pump has run in the last 30 sec onds
to prevent pump motor over heat ing.
The evaporator heater is controlled by am bi ent air tem-
per a ture. When the ambient temperature drops below
40°F the heater is turned on. When the tem per a ture
ris es above 45°F the heater is turned off. An under volt-
age condition will keep the heater off until full voltage is
re stored to the system.
There are several types of remote systems that can be
used to control or monitor the unit. The following mes-
sag es indicate the type of remote control mode active:
NONE – no remote control active. Remote monitoring
may be via ISN.
ISN – York Talk via ISN allows remote load limiting and
temperature reset through an ISN sys tem.
The preceding fi ve messages will appear se quen tial ly,
fi rst for system 1, then for system 2.
The fi rst message indicates the system and the as so -
ci at ed compressors which are running.
The second message indicates the system run time in
days – hours – minutes – sec onds. Please note that
this is not ac cu mu lat ed run time but pertains only to the
cur rent system cycle.
The third message indicates the system, and whether
the liquid line solenoid or EEV pilot solenoid and hot gas
so le noid are being turned on by the microboard. Please
note that hot gas in not avail able for system 2, so there
is no mes sage per tain ing to the hot gas solenoid when
sys tem 2 mes sage is dis played.
A C T I V E R E M O T E C T R L
N O N E
Unit Controls
U N I T A M P S = 5 4 . 0
V O L T S = 1 . 2
S Y S X F A N S T A G E 3
This display indicates the current LEAD sys tem. In this
example system 2 is the LEAD system, making system
1 the LAG system. The LEAD system can be man u al ly
se lect ed or au to mat ic. Refer to the pro gram ming un der
the “OP TIONS” key. The Lead System dis play will only
ap pear on a two system unit.
A unit utilizing hot gas bypass should
be pro grammed for MANUAL with
sys tem 1 as the lead system. Failure
to do so will prevent hot gas op er a tion
if sys tem 2 switch es to the lead sys tem
when pro grammed for AU TO MAT IC
LEAD/LAG.
L E A D S Y S T E M I S
S Y S T E M N U M B E R 2