Space Pak SCM-036 User Manual

– 22 –
Model SCM Air to Water Heat Pump — Installation, Operation & Maintenance Manual
Condition Possible Causes Verication Solution
Low outlet glycol/water temperature in
heating
Dirty coil, damaged or improperly
operating fans
Visually inspect coil condition and fan
operation
Clean coil, repair fan blade or motor as
necessary.
Extremely low ambient temperature
Heating performance falls considerable
as temperatures drop below 20-25°F
Install supplemental heating for extreme
low ambient conditions.
Low glycol/water ow
Damaged or blocked plumbing or air
handler
Check for blockage and/or air in piping,
check operation/condition of water pump
Clean strainer screen
Clear blockage
Remove air in piping
Defective or improper pump
Verify pump operation/condition. Measure
water ow through the heat exchanger
Replace or re-size pump to obtain a
minimum of 10 GPM for SCM060 or 8
GPM for SCM036
Section 10: Troubleshooting (continued)
Figure 21 Troubleshooting suggestions (continued)
Figure 22 Fault codes
Alarm
Display
Alarm Type Reset Logic
Compessor
Response
Pump
Response
Fans
Response
Heater
Response
A1 Freeze warning, system 1 Automatic Stop None Stop Enable
A2 Freeze warning, system 2 Automatic Stop None Stop Enable
Aht High water temp at startup Automatic Stop None Stop None
dF1 Defrost error, cycle time exceeded Automatic None None None None
E1 Return water temp sensor fail Automatic Stop None Stop Stop
E2 System 1 HX temp sensor fail Automatic Stop None Stop Stop
E3 System 1 OS coil temp sensor fail Automatic None None None None
E4 Ambient air temp sensor fail Automatic Stop None Stop None
E5 Refrigerant pressure sensor fail Automatic Stop None Stop None
E6 System 2 HX temp sensor fail Automatic Stop None Stop Stop
E7 System 2 OS coil temp sensor fail Automatic Stop None Stop None
ESP Lost com. with expansion module Automatic Stop Stop Stop Stop
FL Water system low ow Automatic Stop Stop Stop Stop
Hc1 Service hours notication Automatic None None None None
HP1 Sys 1 refrigerant High Pressure fault Auto x3, then Manual Stop None Run 60 sec None
HP2 Sys 2 refrigerant High Pressure fault Auto x3, then Manual Stop None Run 60 sec None
Ht High water temp Automatic None None None None
LHt Low Water temp at startup Automatic Stop None Stop None
LP1 Sys 1 refrigerant Low Pressure fault Auto x3, then Manual Stop None Run 60 sec None
LP2 Sys 2 refrigerant Low Pressure fault Auto x3, then Manual Stop None Run 60 sec None

Space Pak SCM-036 Specifications

General

Brand	Space Pak
Model	SCM-036
Category	Heat Pump
Language	English