Space Pak CSOLSTICE SIM-036, Installation And Operation Manual, Page: 48 / 60

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SIM Inverter Monobloc Air-to-Water Heat Pump
SIM Error Codes
Error Code Description Cause Solution
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Heat pump will not start when called
upon for Heating, Cooling or DHW
Various errors will not immediately appear
on Home Screen until multiple re-start
attempts have been exhausted.
Refer to Section 5 to navigate to Fault Log.
Check for faults and identify below.
P01 Inlet Water Temp Sensor Sensor failed open or shorted. Wiring fault Correct wiring or replace 5k sensor T1
P02 Outlet Water Temp Sensor Sensor failed open or shorted. Wiring fault Correct wiring or replace 5k sensor T2
P04 Ambient Air Temp Sensor Sensor failed open or shorted. Wiring fault Correct wiring or replace 5k sensor T6
P07 Suction Line Temp Sensor Sensor failed open or shorted. Wiring fault Correct wiring or replace 5k sensor T4
P08 Discharge Line Temp Sensor Sensor failed open or shorted. Wiring fault Correct wiring or replace 50k sensor T3
PP1 Discharge Pressure Sensor Fault Sensor failed open or shorted. Wiring fault Correct wiring or replace pressure sensor X1
PP2 Suction Pressure Sensor Fault Sensor failed open or shorted. Wiring fault Correct wiring or replace pressure sensor X2
E01 High Pressure Dischare Pressure
Excessive refrigerant discharge pressue.
If in Heating, high water temperature
or insufficient water flow. If in Cooling,
restricted airlow, dirty coil or high ambient
temperature.
Correct water or air flow, clean coil or lower
water temperature.
E02 Low Pressure Dischare Pressure
Excessive refrigerant discharge pressue.
If in Cooling, insufficient water flow. If in
Heatinging, restricted airlow or dirty coil.
Correct water or air flow, clean coil or lower
water temperature.
E03 Flow error
Undersized pump, excessive plumbing
restriction, pump not receiving signal
Ensure pump is adequate to maintain
specified flow at actual head loss, check
wiring to confirm voltage is supplied to pump
when called for by the heat pump.
E07 Antifreeze Protection Insufficient water flow in Cooling Verify Pump as flow error above
E08
Communication fault with Compressor
Inveter Board
Check internal RS485 wiring between
control board and Inverter Board
Correct wiring or check fault codes indicating
faulty Inverter Board
E19 Primary Freeze Protection
Inlet Water Temperature between 32° and
36°F and Ambient T is below 32°F
Check water temperature. If it is over 36°F,
check or replace 5k sensors T6 or T7
E29 Secondary Freeze Protection
Inlet Water Temperature below 32° and
Ambient T is below 32°F
Check water temperature. If it is over 36°F,
check or replace 5k sensors T6 or T7
P181
Refrigerant discharge temperature
exceeds 239°F
Excessive suction superheat due to
refrigerant undercharge.
Determine loss of refrigerant, evacuate and
recharge system by weight on Data Label
E21 Power supply undervoltage Input power falls below 220V under load
Ensure power supply is adequate to supply
220-240V under maximum load.
E22 Input overcurrent
High amp draw due to high compressor
load or low voltage
Address discharge pressure per PP2 above,
or check input voltage.