Service; Water Coil; Refrigerant System; Condenser Cleaning - Carrier AQUAZONE 50PSW036-360 Installation And Service Instructions Manual

Table 12 — Aquazone™ Deluxe D Control Current LED Status and Alarm Relay Operations
DESCRIPTION
Normal Mode
Normal Mode with PM
Control is Non-Functional
Test Mode
Night Setback
ESD
Invalid T-stat Inputs
No Fault in Memory
HP Fault
LP Fault
FP1 Fault
FP2 Fault
CO Fault
Over/Under Voltage
HP Lockout
LP Lockout
FP1 Lockout
FP2 Lockout
CO Lockout
LEGEND
CO — Condensate Overflow
ESD — Emergency Shutdown
FP — Freeze Protection
HP — High Pressure
LP — Low Pressure
PM — Performance Monitor

SERVICE

Perform the procedures outlined below periodically, as
indicated.
IMPORTANT: When a compressor is removed from this
unit, system refrigerant circuit oil will remain in the com-
pressor. To avoid leakage of compressor oil, the refrigerant
lines of the compressor must be sealed after it is removed.
IMPORTANT: To avoid the release of refrigerant into the
atmosphere, the refrigerant circuit of this unit must only be
serviced by technicians which meet local, state and federal
proficiency requirements.
IMPORTANT: All refrigerant discharged from this unit
must be recovered without exception. Technicians must fol-
low industry accepted guidelines and all local, state and fed-
eral statutes for the recovery and disposal of refrigerants.
WARNING
To prevent injury or death due to electrical shock or contact
with moving parts, open unit disconnect switch before ser-
vicing unit.
Keep all air out of the water coil. Check
Water Coil —
open loop systems to be sure the well head is not allowing air
to infiltrate the water line. Always keep lines airtight.
Inspect heat exchangers regularly, and clean more frequent-
ly if the unit is located in a "dirty" environment. The heat
exchanger should be kept full of water at all times. Open loop
systems should have an inverted P trap placed in the discharge
line to keep water in the heat exchanger during off cycles.
Closed loop systems must have a minimum of 103 kPa during
the summer and 276 kPa during the winter.
STATUS LED TEST LED
(Green) (Yellow)
On Off
On Off
Off Off
— On
Flashing Code 2 —
Flashing Code 3 —
Flashing Code 4 —
On Off
Slow Flash Off
Slow Flash Off
Slow Flash Off
Slow Flash Off
Slow Flash Off
Slow Flash Off
Fast Flash Off
Fast Flash Off
Fast Flash Off
Fast Flash Off
Fast Flash Off
FAULT LED (Red)
Flash Last Fault Code in Memory
Flashing Code 8
Off
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flash Last Fault Code in Memory
Flashing Code 1
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
Flashing Code 7
Flashing Code 2
Flashing Code 3
Flashing Code 4
Flashing Code 5
Flashing Code 6
NOTES:
1. If there is no fault in memory, the Fault LED will flash code 1.
2. Codes will be displayed with a 10-second Fault LED pause.
3. Slow flash is 1 flash every 2 seconds.
4. Fast flash is 2 flashes every 1 second.
5. EXAMPLE: "Flashing Code 2" is represented by 2 fast flashes followed
by a 10-second pause. This sequence will repeat continually until the
fault is cleared.
Check P trap frequently for proper operation.
To avoid fouled machinery and extensive unit clean-up,
DO NOT operate units without filters in place. DO NOT
use equipment as a temporary heat source during
construction.
Refrigerant System —
are at proper levels before servicing. To maintain sealed circuit-
ry integrity, do not install service gages unless unit operation
appears abnormal.
Condenser Cleaning —
require cleaning of scale (water deposits) due to improperly
maintained closed-loop water systems. Sludge build-up may
need to be cleaned in an open water tower system due to
induced contaminants.
Local water conditions may cause excessive fouling or
pitting of tubes. Condenser tubes should therefore be cleaned at
least once a year, or more often if the water is contaminated.
Proper water treatment can minimize tube fouling and
pitting. If such conditions are anticipated, water treatment
analysis is recommended. Refer to the Carrier System Design
Manual, Part 5, for general water conditioning information.
Follow all safety codes. Wear safety glasses and rubber
gloves when using inhibited hydrochloric acid solution.
Observe and follow acid manufacturer's instructions.
Clean condensers with an inhibited hydrochloric acid solu-
tion. The acid can stain hands and clothing, damage concrete,
and, without inhibitor, damage steel. Cover surroundings to
guard against splashing. Vapors from vent pipe are not harmful,
18
ALARM RELAY
Open
Cycle (closed 5 sec,
open 25 sec, ...)
Open
Cycling Appropriate Code
—
—
—
Open
Open
Open
Open
Open
Open
Open (closed after 15 minutes)
Closed
Closed
Closed
Closed
Closed
CAUTION
Verify air and water flow rates
Water-cooled condensers may
CAUTION