PolyScience DA500 User Manual

Code Description Action Required Default
11
Internal RTD probe fault
12
External RTD probe fault
Fault – RTD sensor failure.
Check for open or shorted sensor (reference
resistance value: 100 ohms @ 0°C / 138.5 ohms @
100°C. If probe tests good, replace Control PCB.
N/A
13
Communications fault
14
ADC fault, internal probe
15
ADC fault, external probe
Fault – Default unit to °C or °F. If fault persists,
replace Control PCB.
Note: Some parameters will reset to default values;
this could activate another fault code. Review and
return all parameters to user settings.
N/A
16
High ambient temperature alarm,
front panel
(select models only)
17
High ambient temperature alarm,
rear panel
(select models only)
Alarm – Maximum ambient temperature limit has
been exceeded.
Note: The cooling capacity of air-cooled units is
dependent on an ambient temperature below 104°F
(40°C); performance will decrease as ambient
temperature increases.
Continuous operation at ambient temperatures above
104°f (40°C) is not recommended for any air-cooled
or water-cooled Chiller.
45°C
18
Ambient temperature probe fault
(P3)
(select models only)
Fault – RTD sensor failure.
Check for open or shorted sensor (reference
resistance value: 100 ohms @ 0°C / 138.5 ohms @
100°C. If probe tests good, replace Control PCB.
N/A
19
Pump overload (DAP1) fault
Pump – Check continuity across DAP1 on PCB
through NO contacts on overload relay; reset
overload relay; check pump fuses.
N/A
20
Compressor overload (DAF2) Compressor pressure sensors. See Troubleshooting. N/A
21
Fan overload (DAF1) fault
Fan(s) – Check continuity across DAF1 on PCB
through NO contacts on overload relay; check fan(s)
fuses.
Note: On 10 HP Chillers, both overload relays NO
contacts are wired in series with DAF1.
N/A
22
Pump 2 overload (DAP2) fault
(select models only)
Pump 2 option only – Check continuity through NO
contacts on overload relay; reset overload relay;
check pump fuses.
DAP2
jumpered on
PCB
EFL
Low liquid level or low fluid flow
Warning / Alarm – Fluid level or float switch is open.
Alarm will sound once every 8 seconds for 5
occurrences. If problem has not been corrected after
40 seconds, Fault 05 occurs.
N/A
EHA
High ambient temperature alarm
Alarm – The ambient temperature (as measured on
the Control PCB) is higher than the high ambient
temperature setting. If ambient temperature stays
over 5°C above the HA setting, Fault 16 or 17 is
activated.
Lower ambient temperature or increase the HA
setting.
45°C
EHL
High limit temperature alarm
Alarm – The temperature set point is higher than the
high limit temperature setting. The display alternates
between EHL and the fluid temperature. The unit
continues normal operation. If the fluid temperature
rises above the HL setting, Fault 03 is activated.
Decrease heat load or increase the HL setting.
95°F (35°C)
110-279 32

PolyScience DA500 Specifications

General

Brand	PolyScience
Model	DA500
Category	Chiller
Language	English