Справочник Пользователя для Carrier RVR

41

LEGEND

RV — Reversing Valve

X

X

Green Status LED Off

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.

X

Reduced or no water flow in 
cooling

Check pump operation or valve operation/setting.

Check water flow adjust to proper flow rate.

X

Water temperature out of 
range in cooling

Bring water temperature within design parameters.

X

Reduced or no airflow in 
heating

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 Tables 8-13.

X

Air temperature out of range 
in heating

Bring return air temperature within design parameters.

X

X

Overcharged with refrigerant Check superheat/subcooling vs typical operating condition Table 21.

X

X

Bad HP switch

Check switch continuity and operation. Replace.

X

X

Insufficient charge

Check for refrigerant leaks.

X

Compressor pump down at 
start-up

Check charge and start-up water flow.

X

Reduced or no water flow in 
heating

Check pump operation or water valve operation/setting.

Plugged strainer or filter. Clean or replace.

Check water flow adjust to proper flow rate.

X

Inadequate antifreeze level

Check antifreeze density with hydrometer.

X

Improper freeze protect set-
ting (30

 F vs 10 F)

Clip JW2 jumper for antifreeze (10

 F) use.

X

Water temperature out of 
range

Bring water temperature within design parameters.

X

X

Bad thermistor

Check temperature and impedance correlation.

X

Reduced or no airflow in 
cooling

Check for dirty air filter and clean or replace.

Check fan motor operation and airflow restrictions.

External static too high. Check Tables 8-13.

X

Air temperature out of range Too much cold vent air. Bring entering air temperature within design

parameters.

X

Improper freeze protect set-
ting (30

 F vs 10 F)

Normal airside applications will require 30 F only.

X

X

Bad thermistor

Check temperature and impedance correlation.

X

X

Blocked drain

Check for blockage and clean drain.

X

X

Improper trap

Check trap dimensions and location ahead of vent.

X

Poor drainage

Check for piping slope away from unit.

Check slope of unit toward outlet.

Poor venting. Check vent location.

X

Moisture on sensor

Check for moisture shorting to air coil.

X

X

Under voltage

Check power supply and 24 vac voltage before and during operation.

Check power supply wire size.

Check compressor starting.

Check 24 vac and unit transformer tap for correct power supply voltage.

X

X

Over voltage

Check power supply voltage and 24 vac before and during operation.

Check 24 vac and unit transformer tap for correct power supply voltage.

X

Heating mode FP2>125

 F

Check for poor airflow or overcharged unit.

X

Cooling mode FP1>125

 F 

OR FP2< 40

 F

Check for poor water flow or airflow.

X

FP1 temperature is higher 
than FP2 temperature.

Swap FP1 and FP2 thermistors.

X

FP2 temperature is higher 
than FP1 temperature.

Swap FP1 and FP2 thermistors.

X

X

No compressor operation

See scroll compressor rotation section.

X

X

Compressor overload

Check and replace if necessary.

X

X

Control board

Reset power and check operation.

X

X

Dirty air filter

Check and clean air filter.

X

X

Unit in 'Test Mode'

Reset power or wait 20 minutes for auto exit.

X

X

Unit selection

Unit may be oversized for space. Check sizing for actual load of space.

X

X

Compressor overload

Check and replace if necessary.

X

X

Thermostat position

Ensure thermostat set for heating or cooling operation.

X

X

Unit locked out

Check for lockout codes. Reset power.

X

X

Compressor overload

Check compressor overload. Replace if necessary.

X

X

Thermostat wiring

Check Y and W wiring at heat pump. Jumper Y and R for compressor 
operation in Test mode.