Moisture Check - Carrier AQUAZONE 50PTH Installation And Service Instructions Manual

To perform moisture check:
Moisture Check —
• Check that connectors are orientated "down" (or as recom-
mended by equipment manufacturer).
• Arrange harnesses with "drip loop" under motor.
Check motor, controls wiring, and connections thoroughly before replac-
ing motor.
Orient connectors down so water cannot get in. Install "drip loops."
Use authorized motor and control model numbers for replacement.
Keep static pressure to a minimum by:
• Using high efficiency, low-static filters.
• Keeping filters clean.
• Designing ductwork for minimum static and maximum comfort.
• Improving ductwork when replacement is necessary.
Size equipment wisely.
Check orientation before inserting motor connectors.
FAULT HEATING
Main Power Problems
HP Fault — Code 2
High Pressure
LP/LOC Fault — Code 3
Low Pressure/Loss of
Charge
FP1 Fault — Code 4
Water Freeze Protection
FP2 Fault — Code 5
Air Coil Freeze Protection
Condensate Fault —
Code 6
LEGEND
LED — Light-Emitting Diode
RV — Reversing Valve
TXV — Thermostatic Expansion Valve
Table 31 — Good Practices
DO
Table 32 — WSHP Troubleshooting
COOLING POSSIBLE CAUSE
X X Green Status LED Off
X Reduced or no water flow in cooling
X Water temperature out of range in
cooling
X Reduced or no airflow in heating
X Air temperature out of range in heating Bring return-air temperature within design parameters.
X X Overcharged with refrigerant
X X Bad HP switch
X X Insufficient charge
X Compressor pump down at start-up
X Reduced or no water flow in heating
X Inadequate antifreeze level
X Improper freeze protect setting (30F
vs 10F)
X Water temperature out of range
X X Bad thermistor
X Reduced or no airflow in cooling
X Air temperature out of range
X Improper freeze protect setting (30F
vs 10F)
X X Bad thermistor
X X Blocked drain
X X Improper trap
X Poor drainage
X Moisture on sensor
• Check if condensate drain is plugged.
• Check for low airflow (too much latent capacity).
• Check for undercharged condition.
• Check and plug leaks in return ducts, cabinet.
Automatically assume the motor is bad.
Locate connectors above 7 and 4 o'clock positions.
Replace one motor or control model number with another (unless
replacement is authorized).
Use high pressure drop filters.
Use restricted returns.
Oversize system then compensate with low airflow.
Plug in power connector backwards.
Force plugs.
Check line voltage circuit breaker and disconnect.
Check for line voltage between L1 and L2 on the contactor.
Check for 24 vac between R and C on controller.
Check primary/secondary voltage on transformer.
Check pump operation or valve operation/setting.
Check water flow adjust to proper flow rate.
Bring water temperature within design parameters.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
Dirty air coil — construction dust etc.
External static too high. Check blower performance per Tables 9-13.
Check superheat/subcooling vs typical operating condition per
Tables 20-23.
Check switch continuity and operation. Replace.
Check for refrigerant leaks.
Check charge and start-up water flow.
Check pump operation or water valve operation/setting.
Plugged strainer or filter. Clean or replace.
Check water flow adjust to proper flow rate.
Check antifreeze density with hydrometer.
Clip JW2 jumper for antifreeze (10F) use.
Bring water temperature within design parameters.
Check temperature and impedance correlation.
Check for dirty air filter and clean or replace.
Check fan motor operation and airflow restrictions.
External static too high. Check blower performance per Tables 9-13.
Too much cold vent air. Bring entering air temperature within design
parameters.
Normal airside applications will require 30 F only.
Check temperature and impedance correlation.
Check for blockage and clean drain.
Check trap dimensions and location ahead of vent.
Check for piping slope away from unit.
Check slope of unit toward outlet.
Poor venting. Check vent location.
Check for moisture shorting to air coil.
51
DO NOT
SOLUTION