Service; Unit Inspection; System Flushing; Water Coil - Carrier AQUAZONE 50KQE Series Installation, Operation And Maintenance Instructions

Table 13 - Aquazone D control current LED status and alarm relay operations
Description
Normal mode
Normal mode with PM
...)
D 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

9 - 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 compressor.
To avoid leakage of compressor oil, the refrigerant lines of
the compressor must be sealed after it is removed.
IMPORTANT: All refrigerant discharged from this unit must
be recovered without exception. Technicians must follow
industry-accepted guidelines and all local, state and federal
statutes for the recovery and disposal of refrigerants.
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 and national profi-
ciency requirements.
IMPORTANT: To prevent injury or death due to electrical
shock or contact with moving parts, open unit disconnect
switch before servicing unit.

9.1 - Unit inspection

Visually inspect the unit at least once a month. Pay special atten-
tion to hose assemblies. Repair any leaks and replace deteriorated
hoses immediately. Note any signs of deterioration or cracking.

9.2 - System flushing

Properly clean and flush system periodically. Refer to pre-start-
up, system cleaning and flushing section.
26
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.

9.3 - Water coil

Keep all air out of the water coil. Check 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 frequently if
the unit is located in a "dirty" environment. Keep the heat
exchanger 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.
Check P trap frequently for proper operation.

9.4 - Filters

Inspect filters. Establish a regular maintenance schedule. Clean
or replace filters frequently depending on need.
To remove the filter from the 50KQE unit, slide the filter out of
its frame located in the return air opening at the bottom front of
the unit. When re-installing the filter, use the slide-in rails of
the filter frame to guide the filter into the proper position.
CAUTION: 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.
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