Carrier 42QH30-H User Manual

5
5. SYSTEM OPERATING LIMITS
COOLING HEATING
Difference
Dry Bulb
Temp. C°
Wet Bulb
Temp. C°
Difference
Dry Bulb
Temp. C°
Wet Bulb
Temp. C°
Indoor temperature
Maximum
Minimum
32
21
23
15
Indoor temperature
Maximum 27 -
Outdoor temperature
Maximum
Minimum
55
21**
-
-
Outdoor temperature
Maximum 21 -
MAIN POWER SUPPLY
System
Model
Nominal
Power Supply
V/1PH/50HZ
Minimum
Voltage
Maximum
Voltage
Min. Voltage 200-240 180 264
Max. Voltage 220-240 198 264
NOTES:
* When the unit is operated above or below these limits for a long time, system diagnostics may detect
a malfunction and the unit will not operate properly.
6. SYSTEM SAFETY PROTECTIONS
6-1 FOR HEAT PUMP SYSTEM
PROTECTION TYPE PROTECTION EFFECT OPERATION MODE WHEN ON
Cold draft prevention Indoor fan off Heating mode During unit operation
Defrost cycle Indoor fan off Heating mode During unit operation
Indoor coil
Freeze protection
Compressor off Cooling mode During unit operation
Against frequent
Compressor cycling
Compressor
Time delay
Cooling or heating
modes
At unit start-up or change of
operating mode
6-2 FOR COOL ONLY SYSTEM
PROTECTION TYPE PROTECTION EFFECT OPERATION MODE WHEN ON
Indoor coil
Freeze protection
Compressor off Cooling mode During unit operation
Against frequent
Compressor cycling
Compressor
Time delay
Cooling mode
At unit start-up or change of
operating mode
WARNING:
During heat pump operation the system will undergo several defrost cycles to remove ice that might collect on the outdoor
unit in very low ambient temperature. In these cycles, the indoor fan will be automatically off and cannot operate until
defrost cycle is completed.

Carrier 42QH30-H Specifications

General

Brand	Carrier
Model	42QH30-H
Category	Air Conditioner
Language	English